I never noticed that screw compressor, but it was the ABAC floor one I was looking at from that same website, as I've at least heard of ABAC, so hopefully spares will be available should they be needed.

I ideally need a vertical tank, unless I build a lean to outside, or stick it up in the rafters. The main reason I was considering a screw, was for the better efficiency and far quieter running, but I'm going to see how I get on with the hydrovane first. Going by the figures (4.3CFM at 10bar), it should provide more than enough air for the vacuum table.