I've used a 'U' handle trimmer for the last 10 years. I am wondering if the bike style would be easier to use and less fatiguing. Which do you prefer and why? I am currently looking at the Stihl FS 80 and the redmax BCZ3001SW (smallest with a bike handle) on the manufacturers' web sites. I don't know if I have a Redmax dealer in the area. I'm leary of the 4 mix engines and thus am trying to stay with 2 cycle. Should I be leary of 4 mix units? All of the dealers here are extremely busy during the cutting months and take weeks to repair equipment (and probably to adjust valves).