Still not sure why you would need to rotate the plate.
Have you had to do that for all of them?
The dual drilling, I suppose like what is on the Rover base, is for sideways or forward mouting but the motors on rover with that base are all fwd mounted.
Id have to go look at one of the engineless rover bases ive got here to check but im pretty sure they only have one set of holes drilled and there is one hole thats drilled but not used.
The earlier blue bases were dual drilled as the motor could be sideways or forward, or the even earlier, sideways or rearward. The later victas were also dual drilled for sideways and if the spacer ring was used for forward mounting.
