I started USTA play this winter in Mixed doubles. I self rated as a 3.0. I've gotten offers to join two teams for the summer men's season one at the 3.5 and one at 4.0 (yeah, I've improved a lot- clinics, lessons, my own ball machine). When should I appeal up to the 3.5 level so that I can play both those levels but not disrupt me playing at 3.0 in Mixed this winter? Can I do this now, or do I need to wait for the mixed season to end?