I picked up a used 2009 rg100 today. I've been doing all my grinding with my 8018 and was looking for a used or repairable 7015 on wheels for residential work. An RG 100 popped up on craigslist for not too much more than a 7015. It's 4x4 and came with a trailer. 530 hours and needs a few little things,(nothing major). I took the plunge. Does anyone have one of these? Don't know a great deal about them. It has wore out super teeth so I'm going to switch to the CEI type that look like vermeer teeth simply because I have a couple of 5 gallon buckets of them to use up.