I mount mine through the fuse side, never the fiberglass cowl. If I decide to move it some day it's easier to fill a hole in the wood instead of the fiberglass or plastic. I have also had the cowls crack where the dot goes. I like to glue in a piece of hard wood on the inside of the area the dot will go so I'm not compressing balsa wood. I also fuel proof the heck out of the area.