I have a 2005 marker and am upgrading it. While doing the polishing of the internals, I noticed a couple of divots in the side of one of the receivers. Without repeating the whole story, I'll probably just buy 2 new receivers since they don't come in my older finish anymore. I know the rear bolt has been redesigned on the '06 models and I figured I would update it. Then I got to thinking. What else has changed or should I upgrade on my internals?

Here's my current setup:
1. TechT cyclone mods
2. DOP RVA
3. HPA
4. APE e-grip

Here's my list of mods I'll be getting/doing:
1. 2 new receiver halves
2. polish internals
3. '06 rear bolt
4. polish rear bolt
4. rear bolt insert
5. JCS gold powertube
6. DOP front bolt
7. PPS male stab

Am I missing anything? Do I need any newer parts if I update the rear bolt?

add a palmers stab and your setup should be butter

Do I need an updated valve, spring kit, or anything like that? I want to get any improvement I can over the original 2005 design.

From what I've seen on TippmannParts.com, they have an update for people like me that want to update their receiver halves. A-5 Receiver Half Update - October 2007 My question is, since I don't have a R/T, what do I close up the 2nd banjo hole with? Also, the manual doesn't even show this update on their website.