good for you for stretching your skills!! I don't know how hot it gets where you are, but I took a 100X110 top, pieced together a back and quilted it with no batt. without batt it fit through the machine with no bother at all. Quicker done, quicker usable
Looks beautiful on the bed.
I enjoyed the big stitch I did on some wall quilts, but never could make the end and start invisible like we can with standard thread