CCM Clamping Feedneck
Dye Stickies
Roller Bearing Trigger
ShockTech On/Off ASA
I bought this marker used.
It had a bunch of things wrong; the board was bad, the QEV was leaking and it was filthy.
I cleaned it up, replaced the bad parts (removing the QEV), and got it running again!
It's been good as a loaner, but I've never played a game with it myself.