What is the best tool for trimming the canopy bubble?
You want to use something that abrades the material quickly without chipping or removing material too fast. One builder recommends a 2″, circular, composite trim-saw blade called a “TUF-GRIND”. Also mentioned is a Dremel tool with an abrasive ball or cutting wheel and a belt sander. Avoid using a jigsaw as this may cause cracks to develop later. DO NOT USE A DRILL BIT.