Just bought a back pack on last week,came friday, but the battery is dodgy I think. (It was a returned item, but i was told it was fully working! did get a good price, i thought!)
Annoying, as I was hoping to start work with the WFP tomo for the first time!!

Now having secong thoughts about backpack altogether, and wondering if I should just get a tank fitted in van with shurflo pump and controller??
