I think the ignition systems could possibly be made lighter by using a remote coil. That might also make packaging/installing in the airplane easier too. The small circuit board could be easily placed somewhere in the smaller models, and the coil perhaps in another location in the model, or out on the firewall, etc. No heavy complete ignition system in a metal box, potted in epoxy.

I have some circuit boards without coil from CH that I use like this, but I use the fairly heavy Zenoah external coil. A smaller, lighter coil, used remotely would be cool....

AV8TOR