Some great info guys!
I really like the fact that I can post on here and get such a wealth of info/experience quickly.....

I haven't started surgery on the Citabria yet.
There is a bit of slop in the bellcrank linkage setup, though I'm sure it's no more than the original.
Right now I'm back to thinking how to cut the one piece servo to bellcrank linkage into two, then mount a round servo arm....