I've got a 20 yr old Hyside 14' self bailing raft with lace in floor. I can't get the floor to hold air - slow leak(s) - I replaced the fill and pressure release valves, patched a few areas that did bubble soapy water. But, lots of areas with cracking material. I think the floor material is old and has areas of very slow leaks. A replacement floor is crazy expensive from Hyside - around $1500. Has anyone used one of those "fix it from the inside" repair products on a floor ? .. such as Flexseal, Toobseal, West Marine Inflatable Repair, etc .. The Q & A section on NRS site a few say it will not work on the I-beam style floors because it might be hard to move the material all around. I'm figuring that if the air can get all around, then the product will too - there must be perforations in material and such between tubes/I-beams - just keep rotating the floor around .... right?? Any thoughts or suggestions? Thanks.