Hi folks. A few years ago I rebuilt a compressor and posted the full rebuild on this site, https://www.mig-welding.co.uk/forum/threads/clarke-se16c150-pump-rebuild-tips.56393/ I’m still planning on doing a rebuild of a classic IR Type 30, but in the meantime I need a working compressor and the clarke one in the link is long since sold. I’ve just bought a lovely Sealey SAC1153B for peanuts - £50 (the red one in the picture above)And although it’s a recent unit, the pump is scrap - both con rods sheared! So must have been run without oil. The rest of it is fine though. So I need to either rebuild the damaged pump or just buy a new pump - I’ve quickly priced up the parts for a rebuild and it’s over £120. The existing pump has cast iron cylinders and an aluminium crank case and heads. Learning from my first rebuild, I can’t justify the time and cost of a rebuild when I can get a new pump from machine mart on a vat free day for the same price - so a new one it is. As a 3hp unit, I have a choice of a few: The NH3CV: V-twin cylinder and (what looks like) all cast iron, though not confirmed in the description. £120. The NH3AP: Twin cylinder mixed aluminium and cast iron. £129. The NH3APP: as above but a more modern design. £169. They’re all in this link: https://www.machinemart.co.uk/c/air-compressor-pumps-pumpmotor-units/?s=pricelowhigh&minimum-motor-required-hp=3.0|3 is one design better than the other? I would have thought the V-Twin would have been more expensive, but it’s actually cheaper. key things to me are: noise (neighbours), spares availability (Clarke are OK in this respect, but not as easy to order as Sealey), reliability and... whether it’ll fit the footprint on my compressor without interfering with the fan-guard and (ideally) letting me retain the stock drive belt. I had great advice on my last rebuild thread so thought I’d see if there was any guidance here before I part with my cash. thank you.