My hedge trimming business is growing and I'm about to add a pole unit but can't decide whether to take a dedicated unit or a split-shaft alternative. My main concern with the kombi is the weight and coupler position where the grip would be. Some manufacturers state the kombi version to be a full pound heavier than a dedicated unit. On the other hand I like the space saving feature of the split-shaft. Can any of you fellow owners chime in and share their opinion on which is better?