First off, if you do a search, there is tons of stuff on here about this plane that will probably answer all your questions so I will hit a few critical high points.

I have built and still have/fly two of these. One with a Saito 1.80 and the other with MVVS 1.60Gas, so take my comments for what they are worth.

Grass: If it gets long leave the wheel pants off. I have not used them on either of mine; they are a pain to assemble just for looks.

CG: Neither of my planes needed nose weight. I actually had to move everything as far back as I could on the MVVS. Even with my limited flying experience I think the CG is optimistically forward.

Durability: These planes are very sturdy. I have banged and pranged both of mine several times. Dead stick ditch landings, flown into soccer goal, etc, etc. I have not glassed either wing and have seen no indication you need it. All this being said, there are a few weak spots - the aileron servo trays, the landing gear blocks and the cowling. Slop epoxy all around inside of the servo trays and on every joint you can find around the landing blocks. I have torn out both my gear blocks because of "situations". The good part is they are easily reparable and I have had neither come loose after I repaired them. The cowl is somewhat fragile. Make sure you leave plenty of space around things that protrude and vibrate. Don't be too ruff with it or you will be epoxying cracks.

Electronics: I have Hitec 605's on (dual pushrod) elevator and ailerons. Hitec 5925 digital on rudder. Seem to work very well.

Tips:
-Sealed aileron and elevator gaps with ultracoat.
-make sure you trial fit wing to make sure you don't need extra spacer.
-Remove covering over hole in front of fuselage and cover with 1/16" ply when done. makes working on things much easier.
-Replace short landing gear bolts with allen heads and mount with nuts on out side, saves a lot of aggravation.
-Make sure you mount all switches on right side of plane so you don't have to reach over to turn things on and off.
-chuck the tail wheel and get a Sullivan.
-Forget factory instructions on how to mount wing. Its a total pain, hard to do and the supplied wood is weak and will enlarge after a few flights.
(1) Expoxy a piece of good 1/8" ply (grain accross the big holes) behind the wing mount bulkhead.
(2) Stick a dab of grease or chalk on the end of the wing dowels and slid up to bulkhead so that they leave a mark.
(3) Drill the correct size hole, trim everything out and enjoy my smart idea.

If I think of something I missed I'll post later. You will love flying this plane. Just as a flight note: I fly mine on factory recommended Low/3D rates with high expo on both rates. Makes it easy to fly the hole envelope. At 1-1/8" elevator it will still snap if you pull full max elevator, but the high expo makes it very docile to fly in the landing pattern or for normal sport stuff. I'm just now experimenting with 3D so not much help there.