Hi Joe:

We have found that you really don't need the rear support bearing when front mounting. We have logged several hundred flights with an unsupported, front mounted motor and have experienced no problems.

Later - Bob Hunt

Tim,
May experience has been similar to Bob's. The key seems to be having a solid mount wall to bolt the motor to. If you use 1/8" lite ply you can get movement of the motor. I use 3/16" aircraft plywood and use small screws through the doubler into the mount wall which is epoxied in place with 1/4" gussets to add strength.  Make sure you use at least 1/32" plywood doublers. Another option is to get the front mount crutch from Tom Morris, it is very solid and would mount to doublers similar to conventional mounts but they are trimmed out for lightness.

Best,              DennisT