Summary

A simple mounting block to enable the cowl to be fastened to the firewall on an r/c aircraft,

Use servo grommets to create a gap and to protect the fibreglass cowl.

I found that plywood blocks kept splitting and these are so much easier to replace .

Mine were printed in ABS but PLA would be fine, print a few spares, you may find they are popular.

I have included the Fusion 360 file so that anybody can modify the design to suit their own preferences.