I have a Janome 6600 and do all of my own quilting, even the big ones! I recently completed 3 utility quilts (very scrappy) that used 10" squares and were 100x100. I had used a double poly batting, so too thick to try FMQ, just did straight line quilting. I did point-to-point diagonals, both ways, and also SITD on all seams. I know that it was several days of "quilt for a while, take a break, then back quilting" to get them done.....am guessing between 20-25 hours for each. If I do FMQ it can take me weeks, because I am very slow and deliberate.