My little Tub-Sub (about 1 inch long) gets to about 2 foot depth, try dipping the top of the aeril into the water.

Ive used a nikko seawolf before it performs pritty well, very well actually, exept it wont go very deep.

I would buy one of them but living in inner London it'd be a bit hard to run it anywere apart from the pond in the park and also they look hard to mod,[sm=surprised.gif]

maybe you could stick a couple of pennys or coins inside it to slightly decrease the bouyancy but not too much!