i have a 12" square mirror tile that lives on my long-arm table- it is flat enough that it does not get in the way of quilting and when ever i stop, want to peek i can simply pick it up & look-see how the stitches look. works well for me.

You could also use those strip magnets from Harbor Freight to hold the quilt sandwich down onto the belly bar. To see the underneath, just remove the magnets and lift up the quilt.

I use a flashlight and a large hand mirror.

I use a door mirror..lay it on the back table. Most of the time I just run my fingers over the stitches on the back of the quilt..you can feel bad stitches.(Most of the time);)

I also use a door mirror, it just lays on the table under the machine. And you don't have to shine the light at the fabric to illuminate it, just shine the light on the mirror where you want to look and it bounces and shows you the underside of the fabric.

Good idea to use - with my digital camera!

You have a great sense of humor.

Agree that you can feel bad stitches - and tucks in the backing, too!