Was visiting with friends over the holiday weekend. I already knew they had a old tree once struck by lightning, that needed to be dropped. I always carry the Stihl 066 saw and the 130 Kombi system with saw attachment. The 066 (with 20" bar) is old but still ran good until it tried to the tackle this 30"+ oak tree. I was able to cut a wedge out before it died, think something inside the engine broke off! So, I pulled out the 130 Kombi motor (12" bar), put on a new chain & spent a good solid hour cutting little wedges of wood out of the tree. It was already leaning but ending up falling on part of the tree in the background, almost taking out the deer stand! I must say, I'm very impressed with the "drillability" of this saw attachment...pushing the tip of the chain bar into the tree like a drill, then cutting side to side. No kick back at all. It was a fun little job and impressed the ladies So if your wondering what size tree a Stihl Kombi can & will cut, wonder no more!