This message was posted by signman on AmayaUsers.com. PLEASE DO NOT REPLY VIA EMAIL. Instead, respond to the thread on the WEBSITE by clicking here: http://www.amayausers.com/boards/ultimatebb.php?/topic/1/484.html#000007 If you look at the yellow and steel 'top' clamps flipped over, you'll see the difference. The yellow one is 'flat', the steel one curves down on all four sides. This helps to keep the material taunt and closer to the needle plate. Your kits should come with BOTH plates, although I have never had to use the yellow ones, there might come a time where something can't have the 'sides' pushing down on it. And like everyone else said, never leave it 'open'! When you shut down for the night, remove the whole assembly or at least the 'hoop's so you don't forget it's on there when you power up the next time. =========================================================== The AmayaUsers Mailing List Website: http://www.amayausers.com Discussion Board: http://www.amayausers.com/boards Subscribe/Unsubscribe: http://www.amayausers.com/list ===========================================================