That looks awesome. My only change would be a black delrin bolt rather than white to go with the color scheme. Can't believe you did that with a dremel.
Paintball changed for me twice in my life, when a close friend introduced me to pump play and cockers and when I went from woodsball with Tippmanns to tournament ball with my Bob Long Rapper and AKA Viking on the UW-Stout Team. I'm a better player thanks to both occurrences.