Bentwings, just a side note. Nothing like standing next to a radial engine when it starts up. Especially a double row. IIRC the f4u1d had a 4-row radial. Sorry to digress but that video made my day.
yea, another plane-head.
I've got the same junky oiless compressor. So noisy I wear ear plugs when near it. A real PITA. I'm also hoping it will quit so as to justify a nice quiet one. I'll definitely fire it up first. For now, I just locate it as far away as possible.