The engine is running almost 100% now. The problem was tracked down to bad O2 sensors (did not throw codes, acted normal in tests, but the hesitation is now gone) and more recently a PTU wire chopped by the power steering belt, killing the spark to cylinder 1. My idle isn't perfect at the moment because I have to replace the ECU coolant sensor and harness, but those parts are on their way.
The parts from Concept Z haven't shippped yet, so I've been occupying myself with other (inexpensive) things on the Z. Besides finally installing the battery tie-down I've had in my garage forever, I also moved the hatch latch down a little bit and killed the rattle. Also freshened up my rear calipers:
Before -
After -
I am also cleaning up and painting the rear rotors (already painted the front ones yesterday, and they came out well). In the mean time, I am trying my hand at refinishing the wheels, as the stock finish has been toast for a while:
I'll be in Texas the next few days for college transfer orientation, so the work will resume once I get back.