I'm kind of torn on my Celebrity build. Part of me likes the ridiculous ease of installing a single, light weight, shallow depth screen for everything. You get full engine instrumentation, all of it. Used EFIS panels are not terribly expensive, especially if you price out a few decent quality steam gauges.

On the other hand... it's a wood and fabric biplane! It really needs a more vintage looking panel, preferably independent of the electrical system. And since I'm only a few ribs in, it seems I'll have quite a while to hit swap meets and such and watch for deals on the very few instruments I really want on board. I already picked up a really nice looking Westach quad gauge -- oil temp & pressure, CHT and EGT, I think it is. Or maybe some other combination, I'm too lazy to go look right now. Anyway, I'm watching for good deals on decent quality used instruments that either look close to new, or can be restored to like-new appearance. I think I'll probably be looking to install something that looks like it belongs in the airplane

Personally, I would not fly with a tablet based system fed data over a BT or wifi connection. Too fiddly. Too unreliable. I want to know that when I roll up the hangar door, the airplane is going to be ready to fly. No worry about dead tablet battery, USB charger flaked out, software needs an update, any of that cr@p. I deal with that kind of thing all day long, when it's time to fly I just want to bloody well go fly. And it's not like it's going to get you out of the wiring and panel building... you'll still need at least some rudimentary engine instrumentation, and (if you have an engine driven electrical system) a radio and transponder.

What are you planning to use for your Pietenpower?