I have used Sharon Schamber’s method of basting the three layers of a quilt together with the use of two boards for several years. Sharon has a couple of great videos on YouTube here and here that shows in great detail how she does it. When you have time check out her other videos as she goes in great detail no matter what she is teaching on her videos.When I basted this mystery challenge quilt (that I can’t show you yet) I improved the technique a little. I took my two boards and marked the center point and then marked one inch increments to the end of the boards. I numbered the center at 0 then 1s on either side, then 2s next and so on to the last mark. I can position my top and backing more easily on the center of the boards after marking the center of the quilt and the quilt backing.
I use painter’s tape to get my backing and quilt top started on the boards then carefully roll them up, keeping the ends as even as I can so it is rolled straight.