Make a Better Tippmann Custom Pro

DinoTheMarksMan wrote: I am going to buy a custom pro without the E because the field I'll be playing at allows only one shot per pull.  So I was wondering what might be some good upgrades to get?

The E is tournament legal because once set for semi-auto it is not easily changed during play. The improvement over the standard mechanical trigger is dramatic. The stock trigger/sear/hammer system has a lot of creep, is mushy, and heavy. Little can be done to improve that. The E gives you light and crisp release. When you do not have to yank the trigger as hard you stay on target and follow up shots are easier.