So what are you guys using for tubing notchers? They taught us at school how to notch with nothing but a grinder and a file... but that sucks, haha. So I need to get a notcher. I want something that can go over 45* and uses ballbearings or something other than metal on metal bushings. This looks like a good one: http://www.polyperformance.com/shop/product.php?productid=207&cat=90&page=1 But doesn't state whether its bearings or bushings. I swore it used to say that is bearings.