[Ecky]

You're welcome to my K24A2 tune, if you'd like to use it as a starting point.

I found my engine got rough below ~745rpm. Granted, I had removed the balance shafts for both fuel economy and power reasons, but the Insight has no subframe, the engine is bolted directly to the chassis (with poly mounts in this case), and the stiff and lightweight aluminum chassis transmits those vibrations well, so I didn't go any lower to avoid harshness.

I don't see a low idle as hurting it. There's not much load on the engine. K's have great oil pressure, especially off VTEC, because they're designed to have extra pressure due to so much of it being bled off to feed the VVT and VTEC system, which are oil-pressure powered.