Always found it a pain, though, to properly support the floats when out on the hard;- need different height supports depending on whether the floats are extended or folded. Using lumps of wood for this always worried me, having in mind the relatively fragile nature of the float GRP hulls.
This year I found a company that make supports for siting caravans, and they agreed to make me four supports that are rated at a tonne each, and that would adjust between the correct dimensions for supporting floats folded or extended. Did all four for less than £100.
Caravan Siting Equipment, 01205 761866. http://caravanaxlestands-nts.com.
I just made shaped blocks to go on the top. They fit the shape of the float hull exactly, in line with the float bulkheads.
Please click on any of the photos to see them enlarged!
