Need advice on modding a stick.

Hi, I'm new to this site and this kind of stuff.
I recently brought a cheap stick (in a very tight budget) to try out on fighting games at my PS3.
It's a very bad stick, the respond and feedback from it is just horrible so I've decided on trying to mod it.( I don't want to waste the case since it's still usable. I think)
I want to replace them with Sanwa parts but I have no clue what to do on this big thing.

I have try to find any clues and to see if anything has modded this stick before but I guess luck is not always on the right side.

This is the Fighter stick model I brought, I can't find my box so I just search it somewhere on the net.


The name of the stick is called : Fighter 4 Stick. I don't remember it's from what company since the stick itself doesn't list any, and it's made from china.

I'll show how the interior looks like.










The diameter for the button's hole is about 28mm.

The joystick itself has a 4-way square restrictor plate.

I've also noticed the wiring is somehow sticked to the board and also the joystick, So I guess if I want to mod this it will require a lot work.