... and maybe even in blocks. I used to suggest using closed-cell foam insulation (the stuff that's either blue or pink), but some people on this board claim it can become waterlogged. I've never seen evidence of that, and I myself don't believe it's a genuine problem (pieces we've dug up that have been buried for years in saturated soil are never the slightest bit waterlogged, and the material is actually recommended for use as insulation below ground in direct contact with soil, which would NOT be the case if it were prone to taking up water). However, if the naysayers scare you, you can use "the white stuff" which consists of compressed polystyrene beads (it's also cheaper, but is harder to cut into precise shapes, and tends to fall apart during handling). With either material, if you can't get it in large enough blocks, you can use material that comes in sheets. Just stack custom-shaped pieces in the float chamber. Get sheets in a couple of different thicknesses and you should be able to completely fill the chamber.
Electric Kayak Motor
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