SCP Thrust Plates available in standard sizes for 3 to 8.25 inch airframes.
Machined from 6061 Aluminum, bright anodized red for durability and ease of cleaning. Slip into your airframe and allow ALL thrust loading to be transferred directly to the end of the airframe tubing. This eliminates shear loaded joints, and these can be removed and replaced to reconfigure your motor arrangement.
Drilled and threaded to accept the AeroPack line of Flanged Motor Retainers making it a simple process to mount this retainer system. No need to try to drill and line up 12 holes and inserts in plywood ever again.