Thought I better finish this thread off properly with a photo of the compressor I've bought.
A 4yo second hand Peerless Fat Boy model, 110 litre receiving tank, 320 L/m @ 100psi, 3.5HP 15 amp motor driven.
It was only powering air ratchets in a small trailer manufacturing business that is closing down, so I suspect not huge usage rates.
Have already added castors so that I can move the beast if needed, as it's 125kg, but now it's a breeze to shift. Probably only need movement for periodic garage cleaning but who knows.
Am now researching a good filter system I'll mount to the garage wall so that the output air is cleaned sufficiently to support good supply for spray painting as my most critical albeit infrequent major use.
Have been using my die grinder whilst boat building and note it takes some time to deplete the air supply and restart the compressor. So I'm not working the thing to death, unlike the last el cheapo compressor I had started with from Total Tools. Mind you that compressor had lasted me numerous years so I go my moneys worth from it.
Will be a very cheap sale on Ebay shortly for that one!
Thanks all for the comments.
Ciao
Steve