Hello all, My 1st post!

I was always into Emulation and finally got inspired to build a MAME cabby (Primarily for fighting games)
Everything is going according to plan (Thanks to Lucid's Plans) so far structurally.
But I just wired up my CP temporarily with a hacked Microsoft Sidewinder joypad (Planning on an I-Pac2 ultimately).
Honestly, I am disappointed with the Happs Competition Joysticks I got. They can barely hit the diagonals, thought it was my soldering job or the Thick CP panel (3/4") but both are fine, the joystick's range of motion clears the hole. I can't pull off a mere Fireball/Dragon Punch for the life of me!!!
Help! The main reason for the Cabinet is Fighting Games and these Joysticks dont seem to cut it.
My questions are:
Is it the Sidewinder interface that isn't working properly?
Is their some kind of modification I can do to the sticks?
Or maybe break them in?
Or do I need to just find another type of Joystick better suited for Fighting Games (Like a Perfect 360)?
Thanks in advance!!