I took time to get the canopy positioned very close to its final spot, then began transferring the underlying cut line to the top of the plexi. I started by using blue painter's tape and then built that up using several layers of duct tape. This should make a light track for the cutting wheel and help me keep it straight. I checked and re-checked everything quite afew times to get it right. This cut just needs to be close,not perfect at this time.