I have quite a few hours in P68Bs (from back in the 90s). Two things to remember:
1. Never, ever, fiddle with the fuel cocks or try crossfeeding unless you can't conceivably make things any worse, and
2. Pull the alternate airs at the first hint of IMC.
Other than that, a lovely aircraft: you can fly it like an airliner, and you can throw it around like a light-ish single if you want.
Been all round Europe in one, and also done quite a bit of air-air photography with the cargo door off, too.
Nice aeroplane.