Sounds like you were busy! Let me know what Mike says. I'm thinking putting the servos in the tail would be absolutely no big deal, and might even be easier than the stock setup. Just run some extensions back and cut holes in the fuse sides for the servos. A little 16th inch ply where the screw holes are and you're done! In that way you could get a decent CG, even with the Zenoah. I'll bet with an 18-6 on the G26 this thing will hover. Do you know the price on the MVVS? For this ship I'd really like to go with the Zenoah just so I don't have to deal with an ignition batt.
Good work on your research!