Thread: Spraying willows

Looking for some advice please.
I am trying to zap crack and Grey willows at my hunting wetland and stream. While I can acces smallish individual willows surrounded by water using a hand pump 5litre sprayer from my punt, I also need to deal to larger willows on the margins which are only accessible by punt from one side. I need a unit I can carry on my back doen a short track to stream then place in boat and operate from there. The unit below seems to meet the requirement and has a spray reach of 9 metres.
Has anyone used this NZ made brand and is it reliable and well made? Comments appreciated thanks. I will be ising glysophate mainly.

Stanley portable 12volt 30litre unit by Wayne Perkins, Dunedin.