I love using spray baste (have always used 505 but just tried Gunold KK100 and it's fabulous!). If my quilt is larger than a table topper I use spray baste AND pins just to make sure nothing moves. If you use spray baste, how large a project will you trust to spray baste alone? At what size do you add pins? Have you ever used just spray on a twin-sized quilt for example?