Cut oil door hole
I previously marked the location of the oil door in the top cowl. It’s kind of tricky. There’s no definitive edge to measure from. I sort of estimated where the down slope stopped and made some marks. I squared that up and then left about a 1/2″ flange all the way around. I drilled 1/2″ holes in the corners and connected them with the cut off wheel. A file and some sand paper cleaned it up nicely.
I deburred the rest of the cowl hinges as well. I started to look at cutting the door itself to size. There are some scribed marks, but they aren’t square. I squared them up, but then figured out that it was still too large to fit in the recess in the cowl. I inset the marks another 3/16″ on each side. I’ll cut to that line and then sand to fit from there.