I own a mini-revo vxl powered
and of course it own water cause it's sealed and oring protected too...
I run a few time under water, always as smooth as the first day.
Feel free to upgrade your 1/16(1/10) with this nice thing but not a 1/18 !!! cause torque is awesome and lots of 1/18 going to brake under this perfomance !!! Velineom380 Brushless (3S,3M) is really a nice invest !!