Robin, I did wonder why we'd never heard anything more about your machine!
Might be worth posting up over on the HSM forum, as I've seen some quite knowledgable replies to mould queries, without none of the bullshit that the plastics.com forum seems to be full off.

My only purchase so far is a copy of Arburg's practical guide to injection moulding, which I picked up cheap of ebay, so I'm keen to hear about other people's ventures into the injection moulding world.