That makes sense. I have to stitch in the ditch before I go tomorrow so I won't be able to undo it if it's too loose or too taut.
I usually don't tape down so this is new to me. I have a large table I use so it usually works out fine since I've only done lap and baby quilts. I'll try the dime trick and see how it goes! Couldn't find anything on the Net about this either!