had shurflo pack for two years pcb broke after 6months
so made my own flow controller my pump died a couple of months
ago so i bought a 80psi pump from john hewitt £40 something quid
and i bought a couple of extra batterys at £15 a pop.
i use mine everyday for hours on end
keep some spares and you will have no probs,biggest prob
personally i thnk you can get is if you split the pack itself patching
them can be a real pain in arse.
if i was you i would get the cheapest possible as they are all
a bit of a muchness and they are all made in china, probably all
coming from the same factory
if you do buy one got to john hewitt you will get a packs
similar to shurflo and others but at a more resonable cost