Yep, just about. I don’t just throw thing in like that without good knowledge.
Id say the Sullivan Skywriter was the worst of the bunch, I don’t know anyone who had good luck. The KT unit we don’t see much KT stuff in the UK, so it is an unknown. But the other smaller manufacturer units that come and go i’ve seen enough to know I don’t need the hassle. I have sold a lot of Powerbox pumps and other that the lack of understanding some people have and use dirty or contaminated oil and eventually jam the gears ( mainly through lack of use while full of crud) I’ve had very few back. Sold some of the JetCat smoke pumps which have all been good, but much more expensive.

The PB pump has been around a long time, it was improved a few years back and been a great product to be involved with if you don’t like messing with stuff-I know some people seem to get a kick out of making stuff work properly!