Good Luck Rudi,
Again, I would suggest that you do more to the stab than just ensuring the factory glue joints are glued properly. It also needs to be "beefed" up signifigantly.
Last week I was at the field and my buddy and I got into some impromptu racing, my RB against his Lil Toni. We were both between 110 and 114 during straight and level radar passes. Then my buddy starts diving and rips off a 120 and then a 130 mph pass! Well not to be outdone I fire up the RB, takeoff and start with my diving passes, I clicked off a 116, then a 121 and my final attempt from about 500 feet straight down with mr. OS 160 wide open, I would guess at approx 125 mph, resulted in elev flutter followed by some pretty fantastic up and down oscillations. I immed pulled the power back, dropped the gear and limped my way back to the runway. I had to hold almost full backstick and full up trim to maintain level flight. I actually made a greaser on the landing. Post flight inspection revealed no damage to the plane except my elev pushrod looked like a pretzel and my JR 4131 servo was stripped.
The lesson
1. Dont dive your RB from 500 feet wide open.
2. Dont make pushrods using threaded rod. The rod is very weak, use piano wire instead with silver soldered threaded rod ends. I also replaced the 4131 with a metal geared JR 8411.

Anyway I am just returning from the field with four more flights on the RB. Still flies great......just keep the speed below 120mph and you will be fine.