I started quilting my xplusalong the other day. It's definitely the biggest quilt I've ever machine quilted. I've done other big ones either by hand quilting or tying.
I'm doing a pretty simple straight line grid with the walking foot on this one, because I figured that would be the easiest based on its size. I'm using a really pretty pale pink Aurifil 50wt.
Yeah. Manhandling that beast through my machine was a lot harder than I expected! And I have a large harp machine!
Part of my problem is that my set up isn't ideal. My table is relatively small, and I don't have a drop-in table. The quilt kept catching on the edges of my extension table. I improvised with some tv tables to catch the edges of the quilt, and at one point I was using (clean!) rubbery gardening gloves to get a better grip. The process was getting smoother the more lines I did, but it's still going to take a lot of trial and error.