The hoverphysics could definitely be used for a reasonable handling hovercraft, the only problem is the stay-on-water-thing. Should be possible though, gotta do some experiments .
You know what, we need big splashs and waves and stuff for the water. It just feels kinda fake when all it does is make some make some steam. Same goes for the sand.
Take your time, but once you think that it's easy enough for others to handle and it's not too glitchy, may you think of releasing a beta release?
Yes . Currently it works with the small flatbed trailer, kinda awkward but pretty funny to drive around with that. Unfortunately I have no idea how to do sounds:/. Maybe there's someone who could help with that? --- Post updated --- Jbeaming the new parts, so they behave correctly in a crash.