OK. Presets should be working. It might need some tweaking, but it seems to work for me.
If you tune to a sub channel, say HD2, save it as a preset. Then change to any other station, and then click the new preset. The radio will tune to the analog channel first, wait for HD, then switch to the sub. So you’ll hear the main stuff for a few seconds while HD locks on.
Seems to work well. I’ll see what I can do to make it even better. But I’m happy with the progress so far 🙂