George - you have to put me in your will and leave me that header/piper for the K&B 3.5!
I've been looking for a header/pipe for 3.5cc for quite a while and haven't been able to fine one that somebody didn't want an arm and a leg for. [X(][&o]
I say go for the 3.5 in you Lil Extra. And what's wong with taking 4 of the same plane out to the field to fly? We'll be waiting for the flight report.
Hogflyer