I have quite a few flights on mine. Two Saito 30's.
I, too, was concerned about the binding on the elevator pushrod, but it turned out to be a non-issue. Don't worry about it. Don't worry about a second elevator servo, either...just not needed. The aileron linkage is no problem, but mine did not bind significantly enough for me to notice.
I leave mine in one piece to transport.
The elevator/stab IS removeable. Two screws on either side. Just drill them accurately, then take the screws out and harden the threads with thin CA.
If you are going to take the nacelles off the wing, you just take out the four screws holding the stab, too. It's no big deal. I would not want to fool with a jig to hold the booms and stab assembled while transporting.
Some tips from an experienced ARF bronco jock:
Make sure the nose strut is long enough to give a slight positive stance, otherwise you have to really pull it into the air with the elevator upon takeoff.
Reinforce the main gear blocks from the inside. Some epoxy, maybe some glass cloth.

Label all the servo connections well.
Measure your car again and see if it cannot fit in one piece, it's sure a lot simpler.
It's a great model, I really enjoy mine.
Those tiny wheels are fine on grass, by the way.