That sounds like a good setup, how do you like the 660? I considered the 661 and Jonsered 2188 when i was looking for a new milling saw, but ended up with a Jred 2172 because of the lower weight. I'm using a 18" and 25" Stihl bar, with 63 pmx chain from logosol. My project right now is a large birch measuring 40" across.