So started the customer's quilt--AGAIN--today, and just could not get the tension right. Despite having a practice piece on the side of the frame to check any adjustments, it was a mess. Seems after each adjustment it would be fine for about a block width, then it would go haywire--both bottom and top just laying onthe surface. So I'd "unsew" and start again. Practically have worn out the backing! So frankly relieved when had to stop to go to a meeting.