Okay I did find the thread it was posted by Shartley see picture below. All I can say is "Plenty of Balls"

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thanks guys, Its intersting, but correctly I was thinking in a system thats feed my hopper until I consume the paintballs. The extra bigger hopper 450 balls is to big and probably to heavy to take in a marker, and obviously it will easily see for the enemy, I will review the link for the turtle system, Im thinking in something works with gravity or a little vent system that impulse the balls through a tube that is connect to the hopper, and refeeding in equilibration of the number that I consume. thanks a lot for your help

The turtle backpack is claimed to work just fine at 15bps. It is essentially a plastic ball holder in a backpack, with a warpfeed at the bottom.