I suggest with a machine that size, you need to plan your quilting to match the throat. So rather than loading a quilt and hoping to do long straight lines top to bottom, plan a meander or small motif that you can do across the quilt about 4" wide. Then move to the next area.
However, I'm probably not the best one to ask, because I did the exact same thing. Made a frame, loaded my machine, quilted 2 quilts, and abandoned it completely. The even smaller area that you have at the end of the quilt (after you've rolled it and now have most of a quilt taking up your 4" throat) was really disappointing for me. I have a long arm now.