you could put some pva anti slip pad on it.
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Weight per part.
To see the potential for weight reduction, I weighted the separate parts.
You can see that the board, top plate/box plus front bottom plate are ok (weight is without batteries).
ESC box with Aluminium passive cooling plate/mast/fuselage pod are too heavy. Wings are on the heavy side too.
Potential for weight reduction:
AS150 as on/off switch instead of forklift relay: 500g
Direct drive instead of geared setup: 2kg for outrunner in wet, 1kg for 65161
Mast/fuselage/wing: 1.5 - 2kg
Replace passive cooling alu plate, and cool with water (no pump): 1kg
The heavy weight has one advantage: It won’t flip over easily so it’s less likely to fall on the mast or wing…
Looks good with the carbon inserts!
Beware, many reports here that the Osculati’s aren’t water tight. Worth reading for other options:
Well, most of the square have issues but round ones are
more likely to be and the one mentioned was reported to be watertight (in the German speaking group).
Can you give me another hint, which model you choosed? they have 3 models single, double and some special.
Not much choice at the the time, I got a spare prototype, it is single chamber, length is 160cm, width 65cm and thickness 12cm. I would not go longer. The opening should be as far back as possible and rectangular would be better than round as a rectangular box better fits batteries.
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thank you a lot!
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I get custom size inflatable board, and soon make new efoil with inflatable board. what recommendations can you give? What are the features of inflatable boards?
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Lightly 
But when you think you save time for not build a board, you spend much more time for the box inside the Inflatable
It’s mainly the size of the biggest part for transport/storage, that is smaller with an inflatable. Weight isn’t a plus, my inflatable weights 3.8 kg. Box and top plate adds weight as well. You can build a lighter board if you shape it from foam, depending on the size.
If you build one, think about how to set it up easily, mine is a bit too complicated to assemble. If you inflate it, the opening in the board gets bigger.
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That’s crazy. My inflatable I have designed only weighs 2.4kg (without box). There’s no way to get a foam-carbon board that light. Once I add box it will still be lighter than a comparative size carbon board and with the added benefit of being able to fit in a standard suitcase for travelling.
Good to hear I’m wrong in this point, so it’s just my inflatable that is too heavy. Can you share your source so other people can get a light one too? Board only from carbon will not be 2.4 kg but if you add the box and deck plate you will probably get to at least 7kg and that’s possible for a short laminated board. The inflatable might have more volume though.
6kg short laminated board inkluding lid(s).
And i could have saved 1kg, cause i guess i did 1 Layer too much, and laminating with hand i needed plenty of Epoxy. I am sure, with Vacuum i would have saved 1kg
Update:
The mast clamp didn’t last, I fell on the pod, the cable tie broke and then the printed mast clamp was the next weak link:
The duct broke as well, it was the old one from ASA-X without carbon reinforcement.
New mast clamp with 4 x M6 stainless threaded rods:
The white material is POM, so no 3d printed parts under load!
Seal with O-rings and POM plate that is fixed with screws.
3d printed enclosure can be snapped in and fixed with screw cap (copied @SUP-MIKE’s idea)
Thanks as well to @superlefax and @Toto44 from the german speaking group for their support.
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@sat_be i am going to build with the same inflatable board as you. The manufacturer ia asking if I would like single layer or double layer or msi. Im new to all this so would you be able to guide me? Which one should I get? Of course more kayer means heavier but I am worried maybe single layer is too light and isnt strong enough.
I don’t know which one I have, probably single layer. I seems quite strong and if I pump it to 1 bar it is stable and does not flex. It is 160x65x12cm and weights 3.8 kg. I would not go bigger, slightly smaller would be good, opening as far back as possible.
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Thanks for the quick reply!
Any ideas about the center box? ed printed vs all aluminium vs fiberglass? I see a lot of people using fiberglass/ carbonfiber but i dont have any experience in these materials. Will be nice to be able to 3d print but i also read 3dprinted ones shrink in water. Maybe a different material?