On Glens website, the weight range is given as starting at 7.5 lb. Do you think this is possible? I would like one for my OS 91 FX and at this weight it would work well, but once up to 8 lb, it would need a bigger engine.

I would rather go for low weight, plus don't really want to buy a new engine.

I had the 58" version, and really liked it. Unfortunately only lasted a little over a month then lost due to a radio fault.