I will no longer use a Chinese controller for the Prone board.
I don’t want to experience what happened to me again.
I have decided to use a controller from Germany.
It is a Kontronik Kosmik 200A. Developed and produced in Germany.
No VESC 
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Cant keep a good man down…u will succeed im sure. That Kontronik is.pretty pricey no???.
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Yes, new price 850€.
I got the controller used for 450€
Submerged boxes scare me.
Are you sure there wasn’t a water leak which caused the hardware fault on the speed controller?
One cool thing that Lacroix implemented with their efoil was that the whole compartment could be pressurised using a bike valve.
I recently repaired a vortex and for a water proof test, I put a few pumps of air inside from a bike pump, and then checked that the value would still allow air to flow out when pressed a few weeks later. If it holds air, then it waterproof.
A similar method could be used with yours. Or even to test the failed one to see if that was the cause.
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The box is 100% waterproof. I have done many tests.
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Well you work fast!
The fuse seems to be a new addition. I’ve seen them placed on both positive and negative sides in different builds, I’m not sure which end is really better?
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Yes, you are actually right.
The fuse is new.
It makes no difference in an electrical circuit whether the fuse is in the plus or minus line.
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Vesc hardware is hit or miss, but After testing 5 different hardware with bench tests, I Can Say there are some gems hidden in the crap.
Lots of people reccomend the flycolor, but without actual phase current and thermal regulation, the risk of overcurrent and over temp is very high, unless you have the right voltage, right kV, right prop, right foil, right conditions and rider weight.
Its a 12 fet with very good fets, so it’s able to witstand a lot of abuse, but I have now seen a lot of those burned down.
Sorry for your loss!
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Well written Adam. There’s nothing to add 
Of the 5 you have bench tested is there one you would recommend?
First build
Assist only, 6484 outrunner, 8s3p 21700 P42A moly, 85kg rider.
A bit out of topic here, but the makerbase 84100hp ticks all the right boxes. Pushed it up to 190A phase and it handles close to 100A phase continuous without cooling. Bluetooth built in and clean current mesurement across the range, power switch compatible.
The mks 60100hp Is flawled on the current mesurement above 50A, mks75200 Can not mesure inductance properly, flipsky 75100v2 has variable current offset and no phase filters… List goes on 
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Finished my 3 Setups for the Prone and 1.Assist Build. All of my setups now have the rectangular connectors and are therefore compatible with Assist and Prone.
71 Slingshot, 6384
82 Slingshot, 63100
Assist 6384 with clean 71/91 Slingshot
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Yes, here are the files:
https://drive.google.com/drive/folders/1bZbGKcCt1O4EM2hLAghg_X-u3JlccyhD?usp=sharing
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@hangloose Personally, I’ve cooked two ecs, (plus BEC & Rx) and haven’t even made it to the water! I feel bad, your design and execution it top notch. Just a sign that after 10,000 hrs the rest of us may have a chance of catching up with a master!
Having experience with all types of board building, may suggest is pouring some expanding foam around the Bopla box (w/release agent on box if you ever want to take it out clean). You may want to print something to keep the conduit to the tail clear.
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Thanks,
very useful for me.
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