XRAY - Model racing cars

Hi Xray,
This season we bought the 2015 xb4(last year I drove the 2014).
The car runs very well in general but there is one thing that I dont like:
The drive shafts, both in the front and in the rear break easilly!
I have broke 8 this year! This is disturbing and expensive.
I use 2 mm downstop and the upstop oring on each shock + 2 mm plastic clip under the collar in the rear.
Last week I broke the 95 mm central drive shaft.
I use 10000 diffoil in the front and 8000 in the rear.
The slipper is 0,7 mm.
What happened with the Hudy quality?
Last year I didnt broke any, I just switched the pins with the Drive pin repl. tool, nice!
This year I dont need the tool.
I will try to send some photos later.

I had a few of those, usually after landing from jumps hard with locked steering. Then I loosened the slipper a little bit (wasn't noticeable when driving) and since then it has been fine. That might help you.