I have found to have more trouble with the stainless steel screws than with the regular steel screws. The problem i had was they would bend easier especially on the shock ends.
As for springs i run greens in the back and blues in the front, ive never tried reds though.
buy an os cvr or cv.12 and change the head if you buy the cv, and if you need more power out of it you can buy a daves piston and sleeve. You may want to try running a RB x12 pipe, but there kinda pricey. Good luck