hi,
i have the baby extra but am slowly building it due to an engine purchase fiasco. got an engine now and working on it. i like this plane. this is my second 25 percenter and i think it is outright gorgeous. did you go to the wildhare support forum here on rcu? there is a lot of write and discussion on the baby series. some with saitos 125, some with os 120 ax some with brilleli, evolution and a 3w-28 lots of photos on various assembly and modifications and servo locations due to the various engine sizes and weights.
http://www.rcuniverse.com/forum/m_6430183/tm.htm the 260 thread
http://www.rcuniverse.com/forum/m_6753245/tm.htm the edge thread
i.m.o. they are both very very similar in construction and design. go through those photos and discussions and hopefully something will help?
http://www.youtube.com/watch?v=GarFrmaZAvI
yukon's baby edge with a 3w28 and onboard smoke