Hi all, i need to ask some advice about air compressors. I'm just about to enbark on a needle gun marathon and I'm not sure what compressor will do the best job.. I'm hauling my steel boat out of the water for a winter of fun .. I've got lots of inside neelde gunning to do with my friends gun which needs at least 4hp 10 bar constant supply.. the boatyard power is restricted to 16amps so i'm thinking a petrol machine might suit me best although they are a lot more expensive. I do not what to be frustrated because I have to stop every ten mins waiting for the compressor to catch up, i'd rather spend the money on a good second hand machine that will do the job then sell it after I've done with it. i've seen the SIP 04444 Airmate at a just about affordable price, can anyone tell me anything about its quality? having no experience with air compressors I thought it's best to check with guys that really know. thanks for your time. Rich