I think I have settled on the GP 300S-60 as my second kit build (after a SSE as first). Powered by ST-90 I think.

I have read a few huge threads but still have some questions as there appears to be different answers thoughout.

I plan to use the "Adrian" [link=http://www.rcuniverse.com/forum/m_1062376/mpage_1/key_extra+300/tm.htm]mods[/link] to enlarge the elevator with added CB; and enlarge the rudder.

Questions:
1. What extra Balsa do I need to buy for these mods?
2. Should I have elevator on two servos or one? What torque?
3. If two, should I use Y-harness or put on separate channels to allow for fine adjustments (using Futaba-7C). (I assume this can be done with PMIX)
4. For rudder, many seem to suggest pull-pull system. I have no experience with this...how necessary and what advantage? Why not just high torque servo with regular set-up?
5. I will likely NOT move servos to rear but comments welcome (photos of builds makes me think it will be too hard to mod to get everything in right location etc).
6. What prop for ST-90 and this plane?

Thx