Need help with upgrades

This is for my custom pro which is my back up gun but i want it to fly. I play alot of scenario and speedball, and cant really think of any other upgrades that i need

SO far i have a cyclone and a halo that can use, expansion chamber, silver power tube, rocket cock, check it on/off, polished internals, pipe kit, and an egrip is on the way

I am thinking of getting a palmer's stabalizer, and a lighter rear hammer, and the major endeavour that im undertaking with this marker is a custom blade trigger.

Questions about the trigger:

on the trigger for the custom pro there is a metal shroud with a spring can i just make a bump in the alluminun to hit the seer.

should i make the holes for the trigger mounts smaller=lesser play in the trigger

I am goin to make a recess so i can do a magnetic trigger return on the top side, but should i also set some magnets opposing where the spring is so that its more responsive?

Any other ideas or imput would be great

the thing about the metal shroud is that ive seen a few models without it and jsut a hump that sets off the seer and because im getting the egrip i dont thing i need much