I should mention that the reason I hate adding the washers is because imo it is a terrible way to attach the engine to the fuse, with no washers you have two nice flat surfaces mating together, now when you add a washer you have completely blown that and now you have on the engine contacting the fuse on a few small point which puts alot of stress on the fuse and eventually will wear out the connection, the washer will end up imbedding themselves into the fuse over time as you continually need to tighten the bolts. The right way to do it would be to machine tapered shims to go under the motor, but this is complicated and not adjustable. Last night I made a new aluminum mounting plate for my ff540p (to cover up the damage caused by the washer method) and bolted the motor on with no right thrust, I will try the mix and see how it works.

Mike