Ready for test this afternoon. Cabon feels much stiffer than my pump board with amazon epoxy (at box opening)
I prepared the hole in the pad for gore vent on deck in the middle of board.
Surface finish is far from perfect, but as some other said, the board is meant to ride in the air most of the time 
I will rework the hull later if I feel it is dragging too much water at takeoff.
Maybe I work fast because my standards are low 
Fail fast philosophy 
Finished weight is 4.830gr
Sucess
Needs much lower throttle to lift, and lifts very easy. Also used 1401 for this New test. The 1401 feels super flexy, same feeling I had when testing it from a Friend.
The board nose does not prevent toutchdowns as much as I would have liked.
Lost my GoPro 6 in the lake 
had my phone on the wetsuit safety Line and did not take the Time to secure the mouth mount GoPro with a leash, my mistake. Old but working 
Had prepared some floats for the DJI neo, tracking Lost me a few Times but overall nice result!
Very happy about how much I could pump the setup, 8kg all in, not so light but still pumpable.
I also tested standing upright, and even without speed I could stand and be stable, good signal for future paddle tests.
Great. Glad it worked well. Good to see the footage. Are you saying both the genuine axis 1401 and the alibaba one feel they have flex in them?
Yes, not back to back testing but similar feeling.
When I tested axis 1401 and power carbon 820, I tought it was the mast flexing. Now I think it is the fuse/wing or mast/fuse interface flexing.
You Can see in the drone footage the board is very woobly side to side. It is the same mast I used with png1300, and did not have so much Flex then. "Red"axis fuse has a wider head than “black” séries of fuse.
I am getting quite stressed out about safety with the prop. Too many close calls, plus breaking maytech remote springs. Anyone sucessfulled implemented a dead man Switch on maytech remote?
Something you have to hold pressed in order for the throttle to be active ?
Did you see my post? There are some solutions there - about how to react when spring breaks. (And next post about which springs to buy)
'Maytech V3 -Flipsky VX3 - Flipsky VX3 pro - #24 by lishine
Thanks, will check that!
Killswitch on the leash? I use one 
I can see wobbling / possible flex in your video. If you are confident the mast is ok as you have used that on other set ups it must be one of these. The mast to fuselage connection. The fuselage to wing connection. The 1401 wing itself (maybe this copy is not as stiff) or the foil box in your board as this was the first trip out on your bigger board.
Have you tried gently tapping one end of your 1401 wing with everything set up on land. I once had a very flexy mast on a different brand and I could see the whole set up shaking a lot when I did this. The resonance and movement also went on for quite some time before it stopped. This highlighted the mast was not good enough. When I do this with my axis set up, there is a small amount of movement which quickly stops.
I hope you find the source of the problem and can fix it.
Thanks for the feedback, I used the same setup in pure pump in the same session, and had similar high levels of flex. Also had tested official axis 1401 with power carbon 820 mast and pump board, and had same feeling. I think I can improve it sligthly by having shims between mast and fuse.
I had another pump only session with the 1401, checking every bolts and added some thick plastic foil between the mast and the fuse. It was much better 
I still have issue with breaching on the 75 cm mast, but this is mostly rider issue.
The physical challenge is real 
but it’s really motivaiting me to get in better shape.
@macfly1202 thanks, as you know I’m mostly on the quick & dirty but fun aspect, this is my side project
That’s great news. Glad you solved it. Looking forward to your next video clip 
@Bzhwindtalker it’s amazing that you find all that time for DIY and outdoor testing. I think it’s a mental barrier I can’t get over: taking the time to enjoy.
You’re kind of a role model for me, the one I’ve always wanted to be, and yet I’m a tinkerer who spent most of my teenage years in a workshop or teaching kids to sail. Go on! You’re very inspiring. And maybe if one day I get fed up making machine learning algorithms, I’ll take the plunge!
having some “fun” now with chatgpt and python script for pump foil session stats. I know you can relate @macfly1202 
Excellent !!!
Your goal with this script is to visualize low, med and high speed pumping segment ?
On a typical sessions, using a gps watch, it is not easy to know how many times and how long you are on foil. I also wanted to reliably track the max pumping time. I already did the segment extraction online in chatgpt, but I had not way to verify it. Now I can easily extract the best segments and total time on foil (here 10 minutes for a 60 minutes session). It is a work in progress, and very niche use
Excellent !
For info Waterspeed app have this feature on web wiew- you configure foil speed and then it detect and mesure this. As jibe, tack … I use this for Wingfoil. Very good paid app. But doing by yourself is always better !
I prepared prints for another battery, but with pre-wired pogo 14 pin this time.
Spent another 30 minutes trying to solder the bare ones I have, but it is super hard/impossible, especially on a live battery (first one with trash cells)
I will be in south of france next weekend for 3 days with hotel on the beach so I have preparation to do, to have at least two “good” batteries, solve the antenna holding, tape is not durable/quick enough, make paddle remote holder, improve board leash/fix to life vest.
Had a session with only one battery, with the wing and the 1201. There was basically zero wind, I had already tried last spring with slightly more wind and it was more relevent that pushed me to also do the other feet forward, will be helpful if I want to parawing. I basically never winged apart from a few runs without Jibes or tack dialed.
The 1201 seems to work very well with the board and assist, felt solid as far as rigidity.
3rd battery I built for this setup, hopefully that will give me two “good” batteries now
Those cells are salvaged 30Q again, but were sorted for IR<15 mohm and higher resting voltage. I will try P28A next if needed. maybe with the DW board 35E would also work, have to check the IR VS those 6 year old 30Q.
Takes around 1h15 to build one pack. Aligment of the XT90 is not easy, I should make a jig for next batteries. Takes 175 gram of resin to fill up.
