A couple of questions:
1) Is the bottom seat plate mounted all the way back?
2) Are you on the stock pad or ventisit?
My initial thought is that the seat is too reclined until you have ridden and built the muscles, and the entire boom is too far back.
But that model Q45 has a boom I've not used on that model. Those with one should comment.
This is what 6'2" looks like on the previous version. Notice the shoulders rolling forward