That hopper will be fine. All it does is churn the balls constently.
Co2 depends on what valve you are using. The classic and mini valves work great on Co2 and HPA. The rest such as the X valve and R/T dont like Co2 but run great off of HPA and the like. You will have issues with the level 10 bolt on co2 but it can be done.
"I wish simply to be a decent person, yet I will always fear the retards" -Brian Hindt(geech) MCB Moderator Kidney Machine