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I actually did! I had them around for a wind-sup and one day I attached them to one of my windsurfs and took off. Idea was: "maybe when the wind drops I can just add the stabilizers instead of changing board". Unfortunately the only thing I achieved were some nice fountains of water sprouting out between hull and stabilizers 🤔
The water pressure is high the second you gain some speed, it might work in displacement, if the purpose is just to add stability for a beginner. But I still wonder why a practical system to change the volume of a board was never developed. Not anything requiring bolting on/off parts, as it has been attempted. Would be great to have morph hull that can be made larger or narrower using just a pump ...