RE: Super Chipmunk
Salat, I haven't compared the weight to Dave Brown mounts, don't think that I have any of those actually. The lightest plastic mount I have seen are from ACE, for the cox TeeDee engines, might hold the 061 after some mods but they are quite hard to find...
The lightest would be home made wood mounts if done carefully and incorporated into the firewall area during the build. Brodak also has some pre-made in plywood but they are a little weak around the screw holes and I've dropped an engine using those...