Hello all, I am thinking of building a Springer Tug, want to keep cost down by using what I already have. That is a Multiplex Permax 400 7.2v motor, a 30 amp E.S.C. and a 7.2v 2000 mAh nicad. I just want something to potter around with when there is not enough breeze for my yacht, and maybe rescue my yacht if necessary.