I got one of these -
http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=140415422396&ssPageNam e=STRK:MEWNX:IT
You need a compressor that will produce 90psi, but apart from that it uses very little air - I did all the brake and fuel line riveitng and my little 25ltr Lidl compressor only topped up the reservoir once. It's quite a big bit of kit but the actually rivetting nozzle isn't that big - no worse than trying to get the battery drill in to drill the holes.