ptulmer- Thanx, very helpful for model planning stage.

Just got told the SureStart can't be used a s pusher because it lacks a thrust washer, but then the quality posters here at rcuniverse let me know I can retrofit a washer from a different motor on it. Perhaps this tip could have an indepth entry from the gurus here for others in my boat.

--edit- I see in the pic the crank has a spline for the driveplate, is that a hard press or can I get it of by hand. Etch a few radial oil lines in the face of the case, & cut a brass shim thrust washer. Then, the shim should go on and replace the driveplate? What does the propscrew tighten against... will it squeeze/bind the shim washer I install?