Well, wouldn't you know it, a week and half before my biggest show of the year, and my 16 inch Ryobi took a nose dive, a terminal one.  The tension shaft/screw assembly completely stripped out.  After an hour and a half of disassembly, and a call to the local repair shop, (over a hundred dollars to repair a $89.00 unit), it was determined and agreed upon by the wife to purchase a new unit.  We went to Lowes and looked at the 16 inch Delta, and I was very impressed by the differences, the front mount tension, the quick release systems, compared to the cheap plastic things on the Ryobi that failed a week or so after purchasing, as well as the metal insert plate compared to the plastic on the Ryobi.  But despite the wifes puzzled look, as she was ready to hand over the credit card, I decided to come on the site and see if I could get some opinions from you my fellow scrollers.  I really want to make sure I am not wasting a hard earned 100 bucks, as I did on the Ryobi.  The Ryobi did survive a year and a half, but definately was not user friendly.  So any and all comments would be appreciated.  Thanks, Mart