I pulled the trigger after all of these years! It just made sense to get it as all I run on every saw is full chisel chain and the last shop I used quit sharpening chains and when I went to inquire at a shop a long ways from me and when he told me $25 cents a tooth my jaw dropped! I run approx...45 chains for all of the saws.I figured 4 complete sharpenings and it will pay for its self at a cost of $969 to my door.There is a learning curve to it as I discovered... as this was my first swing-arm grinder but I am starting to get the hang of it after running 20 -16 in chains through it for my 260 Pros....I am proud to say I only butchered one! I put a fresh chain on one of the 260s and went to the wood pile and grabbed the knotty piece of White Oak I could find and prayed that it would cut...my fear of failure was unfounded and it ate that Oak up! I did find while sharpening dirty chain that the wheel would dirty fairly fast and I had to dress it often...I decided that was not going to work for me and remembered that I had a jug of Purple Power Industrial strength cleaner out in the barn and mixed it 20 ozs per gallon and let the chains soak for 5 minutes and was I amazed at how well this stuff worked! It melted the built up crud right off! I drove a 16 penny nail into the top of a saw horse so I had a way to hold the chain straight and still and hit them a couple times with a stiff bristle brush and they came out looking as new. I then let the sun dry them and then sharpened them...afterwards they were soaked in oil and are ready to go..now I have a pile of chain for the rest of the saws waiting but after they are done I wont have to do so many at a time as I wont let them pile up like I did this time.. One negative of this new grinder is I now have friends I didnt know I had wanting chains sharpened.... not interested in starting a chain sharpening business as I dont like it that well....lol