My $.02 worth.
I bought one over a year ago and installed spoilers in the wing for RES flights. The spar does not have vertical grained webs installed, which I corrected. ( The instructions do stress high start launches and discourage winch launches.) See here:
I also used a 90° bellcrank in the tail centered in the round port for elevator control. The standard size servo is mounted up front with the rudder servo.
On my third test flight the fuselage broke just in front of the tail while landing. Inspection showed that the glass cloth was not "wetted" with epoxy. I contacted Tower Hobbies and eventually received a new fuselage from them.
When I finished the new fuselage including a plastic tube for the antenna I filled the fuselage from just in front of the bellcrank to the wing trailing edge with spray foam that is sold for sealing against drafts around windows, doors, etc. This added at lot of strength to the aft part of the fuselage with little weight penalty. According to my scale the flying weight is right on the 60 oz. advertised.
The first flight with the new fuselage was in 15 to 20 mph winds using a medium duty high start. The plane flew great and I tested the spoilers at altitude for the first time. They worked fine with no nose down pitch. I increased the rudder throw to all I can get since it was a bear to make the crosswind turn when landing.
With these changes the airplane is great.