We still haven't done anything about a preheat system. What I'm
thinking of now on Michelle P's suggestion is one of those oil pan heat
pads (the metal ones) on a thermostat. Any better/different ideas? I
haven't gotten Ron to agree on anything yet, but once I say "It's below
40, you aren't starting my new engine" he will make some decisions.

I use a Reiff pad with a suitable timer. Works great but only if you
have several hours before you fly.

Ron Lee