Swapping the circuitry of a xbox stick to a PS3 stick case.

Just a question.

I have a 360 BrawlStick and a PS3 SFxT Fightstick Pro. I have swapped out the joiystick and buttons from the PS3 stick into the 360 stick a while back. The brawlstick has served me well but I am wanting to know if there are any issues with swapping the insides of the 360 stick just so I can use the PS3 stick's case.

I have no interest in dual-modding the stick as I no longer have a PS3...I just want the bigger service area.

Can this be done or are there certain parts of the PS3 stick that will not allow this?