It is just a aluminum “U”-Shape → put all electronics inside and seal it.
I sealed it with epoxy which I got a few years ago from a guy from this forum.
I used it for my electric paraglider (winch).
I think his name was Thomas.
If he reads this, thank you again. You may can tell us what epoxy I am using here :-).
Some great ideas there!
Thanks for sharing ! Some nice idea ! 
is it a FLIPSKY VX3 or the new FLIPSKY VX3 PRO (with new RF) ?
I have tested and installed the old FLIPSKY VX3. Had no connection issues at all in the pool.
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The prototype seems a little unfinished to me. I think this detail, coordinated with his aesthetic, will make him perfect.
I hope you won’t be offended, it’s just a joke.
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Some final tests have been successfully accomplished yesterday!
Both prototypes work perfect 
Water temperature was about 5°C.
First session on the lake will be this weekend!
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Good luck with your testing. Working on a similar build and thanks for inspirational simplicity. I was definitly overthinking many things looking at this build 
Did you consider potting the bms separately since they seem to fail more often than a good battery pack, to be able to replace it? Or is it soft potting epoxy you are using so it can be unwrapped?
What is the width, height and wall thickness of the aluminum tube? The 12s2p variant
The video of you paragliding your opensource DIY ewinch (your youtube channel you posted at the start of this thread) is very Wright Brothers inspiring. Love it. Good stuff!
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I am currently using a daly bms with charging only.
Next time I would put it in the very front to be able to change it on demand.
Do you have any recommendations for a reliable bms (12s lion)?
45mm hight, 100mm width
1,5mm alu
It was my first time on a winch ever (after a lot of testing of course).
I think the feeling was close to the Wright Brothers feeling :-).
I still have not yet tested any other winch but have already 100 of starts on mine and could not think of anything better.
STL for the front of the travel battery (bopla box)
STL for a improved gong motor mount (more stable + cable)
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And you have there additional support around the screws? Otherwise 1.5mm maybe too thin…
Many recommend LLT bms for 12s I have not used bms, another common option is having only balancing cables and jst-xh sticking out, for RC charger
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Thank you for validating the design 
. I’ve started the same build now. Gave up the probematic gen1 box and took all the parts out.
I have a 5mm carbon plate 3k quality lying around. Considering as bottom plate instead of the alu, having M3 bolts sticking up to mount a 3d printed lid.
I don’t like or trust BMS at all. Therefore, the battery for my fd v2 version will look something like this. Which version of vx3 did you use, regular or vx3 pro?
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I use the regular vx3. Connection quality is amazing! What is your 12 pin Connector?
Consider thermal issues in your material selections. Pot all electronics all around.
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