I do have a new Stihl limbing saw on order, can't remember which model but it is the same saw they use up in the trees but with a handle on the back, weighs around 7 pounds.... Hopefully it will be here soon!!
STIHL MS 200 Rear Handle
Displacement: 35.2 cc (2.15 cu. in.)
Engine Power: 1.6 kW (2.1 bhp)
Weight PHO: 3.8 kg (8.4 lbs.)
or
STIHL MS 192 Rear Handle
Disp 30.1 cc (1.8 cu. in.)
Power 1.3 kW (1.7 bhp)
Weigh PHO 3.3 kg (7.4 Ibs.)