Well I picked up a McCullough Power Mac 310 today for $20 and have a Stihl 030 (45cc) on the way also. Question for you Mac guys, is the 310 needle or roller bearings on the crank. The 310 runs well and starts on the first or seconds pull but needs a little carb work (easy to do). I can always convert my Poulan 46 and use the Mac for what little I need a saw for. Of course having a nice little 34cc Mac engine wouldn't be bad either.