If you think the CG is correct, easy to check by rolling inverted and seeing how much you need to push to keep it inverted. If the CG is right and still pulling to the canopy on up lines, you need more down thrust. I also fly a spark and noticed it required a good amount of down thrust. The nose has no down thrust build in, so you need to start there. Again my spark needed more downthrust as I was not able to adjust the wing due to lack of wing adjusters. once you added the downthrust; if it is still doing this add a little more. Once you get it right check your 45's and see if you plane deviates. Good luck