Thank you, Paul, yes, that's just the sort of thing I was thinking of. And thank you Sowka (I don't think we've ever "met" before, but then I'm not on here very often these days) - that looks really comprehensive. I take your point about using caution, and in-house terminology (I've already found that several of the phrases I've Googled on seem to be limited pretty much to this manufacturer), but this should be a very useful point to start with.