thanks,
I just took it for a test ride. I do just feel the bag when I ride. I mean I just barely touch the bag when peddling. So I'm going to space it back about 1 inch with a wood block between the mount and the bag. That should do it. I put a spare tube, patch kit, wrench for back axle nut, air gage, set of Allen wrenches, phone, chain tool, 6" of chain in the bag and had like 3/2 + of the bag still free for stuff. So took all that out and rolled up 2 Tee- shirt and put them in the bag. Yep that felled it up like ¾ the way.