OK its been a few days since I have been able to do any work. First off the APC 20.5 x 14 weighs about 100 gms. That is a 30 gm savings over the 22 x 12 (over 1 ounce)

The canopy attachment is next. There are multiple ways to attach a canopy and many will work. Jason showed pictures of Bryan's setup. My preference is pins at the rear of the canopy and 1 or 2 screws at the front. If the canopy was a perfect fit then 1 screw at the front center would work fine. My canopy fits pretty well but needs to be pushed into place a bit, so I will go with 2 screws up front. The kit comes with some phenolic pieces to be used for alignment tabs. It also comes with a piece of 6mm CF rod and 4 CF sleeves. The only use I can find for this is alignment pins for the canopy. I think the inclusion of this is a carry over from prior pattern planes where these pieces were used for the belly pan mounting (Impact). In reality 6mm CF rod is a little overkill. I used a couple of short pieces of 1/8" cf tube supported by a couple of pieces of 1/8" light ply. The CF tube was inserted perpendicular to the rear canopy surface.
Mating sockets in the rear of the canopy mounting area were made from 1/4" teflon tube (1/8" ID). The teflon tube was used to make the pins slide in easily and resist wear. The teflon tubing was glued into a piece of balsa balsa which was sized to be a slight friction fit between the back of the canopy area and the former behind it. The holes in the fiberglass fuse are a little oversized to allow the pins to position the balsa holding the sleeve in the right place while the glue was drying. I used a little 5 min epoxy and held the canopy in position while it hardened.