I've had the opportunity to run a solo once, was a friends dads saw. Coulnt tell you the number on it I think it was in the 50 to 60cc range. We were clearing out a tree line in one of their fields. I was running my 390xp and he had his dads solo. We decided to swap saws for a while. He started felling and I started limbing the trees up. I was rather surprised how well it felt in hand. I would have compared the power to a bit better then a 357xp, not close to the 390xp, but still strong and light. I was rather impressed by it. It was quite an old saw as well. I dont know where they got it, and I've never seen a dealer around for solo.