Hello Blackberry,
It's a lovely quilt, and a really smart sewing machine too.
When assembling large panels of blocks with the QAYG method, you might like to try using clothes pegs to hold the large sections together. This way you can line up the joins. Match up the joins in the middle of the quilt first, and then work away from the middle to each side. Pins or safety pins just aren't strong enough to hold the big sections together. Here is a link to a blog post I did showing this.
http://www.lizzielenard-vintagesewin...-not-pins.html