I might add that volunteers in our area tend to be older people and you must consider the possibility that they may not see as well as they once did. I have macular degeneration and I certainly can see a difference in my sewing and quilting when I get it under a bright light. Maybe a good ott light or sewing near a sliding glass door would be helpful for some. There is no reason why simple quilts cannot be made with wider seam allowances to insure that they stay sewn. Just be extra kind to everyone because they are trying to be helpful. I think a sheet with the wanted requirements for size, seam allowance size, etc. would be appropriate for everyone in the group, and for all newcomers.