[lincpimp]

I have run both, and find no obvious strength benefit using the spiral cut. The lst and muggy use std cut gears, and I have not seen many who have issues with them. As stated, the spiral cut gears will place alot of thrust load on the pinion bearings, so it would be good to have a spacer that goes between the bearings to spread the load. The lst and muggy have this spacer stock, which would no doubt help other vehicles that use spiral cut and do not have the spacer.

Sikeston38m had bearing issues with his DDD outrunner powered revo using spiral cut gears, Have a look at his threads and there is a bunch of info there.