I apologize for not following up sooner
The issue is not really resolved. I have learned how to close the canopy much more quickly by using one hand to apply pressure at just the right spot toward the front and using a 3 inch PVC pipe for leverage to close the final latch with the other hand.
I spoke at length with Bill Canino at SportairUSA. His assumption is that the hinge tubes are no longer curved correctly. They are very difficult to replace because they are epoxied into the canopy. He thinks the best bet is to try to bend them back into shape. He has a couple ideas for how to do that but it is extremely risky because they're hollow tubes and if they crumple, I'm completely sunk. Cutting and welding them is not a better option because the metal is very thin and coated inside to resist corrosion, thus making them difficult to weld.
For now, I'm living with it. One day I may get it to KORK and let his guys take a crack at it. Maybe now that the FAA is talking about re-instituting the $500 rebate for ADS-B installation, I may have a better reason to make an appointment for that and the canopy problem at the same time.