The nose ring was glued in with Hysol 9462 a Loctite product sold by several vendors including BVM Jets under the name of Aeropoxy. I had trouble with the glue hardening which I determined to be due to inadequate mixing. This slowed me down by a few days waiting for things to harden and then having to redo them The nose ring was held in place by the mounted motor.
The prop pulled the mount tight so that the plywood spacer ring imparted enough friction to hold everything in place until the glue hardened. After drying an additional bead of the epoxy was applied around the perimeter of the nose ring.

The nylon stand-offs were cut to 3/8" and worked well. The weight of the nose ring without glue was 11.2 gms. The motor mount pieces including the fiberglass ring and mounting screws supplied with the hacker mount was 25.9 gms or .915 oz. The mount alone with out the hacker parts is 20.3 gms or .715 oz.