I agree with Reginald. I was in your shoes 1 week ago. I flew down to Orlando last weekend and had two 15 minute sessions with a coach. Not only can you arch, you get to learn how to improve your arch, if you are a little flat like I was. I even learned what they mean when they tell you to relax. I always just put my arms a little higher and pretended to know what the hell they were talking about. I finally reached that relaxed state in the tunnel and the light came on. The tunnel was worth every penny I spent. I finally passed my D2 jump (level 5) yesterday and I'm confident that I will pass the next two without any problems. I would schedule two 15 minute blocks with the same instructor if possible that way the coach can pick up where he left off.