I should have done a search first. Now that I've read several opinions regarding front/rear mounting, I see that the opinions are about equally divided. Some say that rear mounting stresses the ball bearings. Maybe so, but ball bearings will take a lot of side loading, which is the mode associated with flying sharp corners.
So maybe my motors will only last for 200 flights instead of 300. It would take me many years to get that many flights on electric, since I also spend a lot of hours flying with glo engines, and spark ignition.