Gemini nitro Hovercraft .46 engine

This thing is huge, runs a .46 size engine and it shifts. This thing actually runs as well on land as it does in the water.
the 'on land' movies are here:
http://tamiyaclub.com/moviecomment.asp?id=1694&uid=3836

and
http://tamiyaclub.com/moviecomment.asp?id=1689&uid=3836