When I came to fit the motor bed I realised the length of the shafts I got put the motors right in the way of the aft stabilizers, so as there was 80 mm. of shaft forward of the bearing bosses I thought I'd move the motors aft 65 mm. this also had the effect of lowering the motors, which is not a bad thing, so now I have all the running gear installed, the motors I bought for the boat are Mabuchi 600s supposed to be 7.2 to 12 volt, but I wasn't to happy with how they ran on 7.2 v. they actually ran better on 12 v. I remembered I had a pair of Johnson 600s I acquired when I got my tug job lot, so decided to change them over, job done these Johnson's run very nicely on 7.2 volt. not sure why that is, they are all 5 pole. next I'll fit the 4 stabilizers.