EMorgan

I'm new here and I may not be posting this in the right place so if not please redirect me. I've had my long arm for about a year and have had a great time with it but I have what is probably a dumb question. When I advance my quilt to the take-up roller when/how often should I adjust the take-up roller height and do I also adjust the backing roller height? I do mostly small quilts which never give me problems but I've had several tshirt quilts lately that give me fits because my machine seems to drag on them after a couple of advances. I've been adjusting the height but it seems to take a lot of time for me to do that so I'm sure there is a better answer out there than what I'm doing. Thanks for any advice. (If you have good sources for long arm info please let me know that, too.)