Assembled the Sensenich prop and temporarily mounted it on the engine.
Rigged an oil stand with hose and funnel to fill engine and remove any air. It took 3 liters. Turned the prop to feed the oil (with spark plugs removed) since oil didn't gravity feed.
Turned the prop, then motored it, but never got any oil pressure indication on the MGL Enigma. No other indications, either, so must be a wiring issue.