Here's another vote for fletching cement. Get it at Walmart, sporting goods, archery aisle. Reasonably priced, does not run all over the place, stays where you put it, dries way faster than RC56/560, holds tight. I normally use a few screws to hold the canopy in place, then squeeze a small bead of Fletch Rite along the joint, let it cure overnight. Next day remove the screws or leave them on. Good screw is the Dubro tiny size buttonhead, looks like a rivet with a little dimple in the middle.