I'm pretty sure that I smell what your cookin Rock.
In fact I have just sat back down after lookin at the Citabria again, lookin to see how to introduce some differential. Unfortunatly, there are no hatches built in for acces to the bellcranks....
Also, as for sealing the hinge line, these are also "Barn-door" airelons*(sp?), making it kinda hard to seal the bottom.....

Thanks again for your time and advice, keep it coming!!!!!!

Edit, I am right now bringing the Citabria out and putting the wing on to better use the advice offered here and to be able to more quickly post results.Will post actual throws, both up and down, shortly.....