Canopy bubble holes EEEK!

Per the KAI's, I enlarged all the canopy bubble holes to #27 using a reamer.

I then chamfered all the holes with this single flute cutter.

The single flute cutter does not chatter like the multiple flute cutters do but you have to be extremely careful as these cutters are very aggressive and if you are not perfectly perpendicular to the hole, they can grab and take out a chunk!