Mark
It sounds like you are getting close to competition trim. yes, maybe it will help to reduce the pull to canopy with another shim to the upper wing. but if it's not
serious and can adjust with program mixing then just leave it. it's good for you. you get better way to smooth the higher speed downline exits by mixing.
That's the real fun and self confidence for your flight and plane. I envy you that you can still have a nice flying at your place. In korea it's already winter.
I look forward to hearing from you more fun and better performance with your PASSION.
Sungho