I bought some Competition Pro Mini and most of them have brocken microswitches
I found some replacements here:
http://www.voelkner.de/products/43525/Microschalter-Ultraminiatur-5A-250V-Sim.-R.-Hebel.html
It was very tricky to add the Universal TX PCB in this tiny stick but after all it looks great
After removing original parts I add a Led and two more micro switches for Select and Start.
The chrome switch to swap between Layout Select/Start and Button X, Button Y
I must move the electronic of the LiPo to put it between the two fire Buttons