Cannot move up blocks - keeps it on water or extremely flat land, possibly has an internal storage, needs fuel, requires lots of rubber (slime) for the air cushion (3 or 6 blocks?).
Rendered on the ground with no fuel but slightly floating when 'on' or fueled .... (extra work)

this sounds cool, could put in a optional recipe for thermal or ic2 to use their rubber as well (if not already implemented) i havn't tested this mod at all so

Some type of water craft transportation for players & items would be nice.

only 3-6 blocks of slime? ... the other machines currently require 8 blocks .

lol ok nevermind make rubber sheets as a separate recipe (3 blocks) and requires 2 to 3 rubber sheets