If you are concerned with the stock control rods try a simple test. Lightly hold the elevator then the rudder while moving the sticks. Did you get much flexing in the control rod? If you decide to rear mount the servos at some point look at some of the Ultra Sport 60 threads. There are some great pictures in them that cover it. If they do flex badly then you might try something like the Dave Brown control rods or arrow shafts.

As for me, I did lightly reinforce the landing gear block and rear mount my servos - offset the weight of the G23 in the front. If the wing was assembled correctly I see no need to add glass to the center. This has not proven to be a weak spot on any of the 40 - 60 or 120 US that I have owned. I do however add cut glass to the epoxy when I assemble.

I did have a problem with the US 60 cracking just in front on the tail, could have been from landing too manny times too hard on the tail wheel. No problem with any of the stabs breaking or getting loose.

Ed M.