We have one. No one on my team wanted to do it at first, but being the lead build mentor I pushed for it and refused to back down from this one little system. My reasoning was something along the lines of "bots on Einstein will have one!".
At first it was going to be a long trough on the side of the bot, which wound up being to volumous to implement. We then integrated it in with our shooter design, which is a suspended turret.
All we have to do is drive as fast as possible, ram into the outpost, get the empty cell on our shooter ramp, reverse the shooter to back it up, then rev up the shooter, open the gate, and shoot the empty cell into the air lock when we're within 10 feet of it. We'll need some practice to get a shot off like that, but I expect that we'll be good at it by the time our 2nd regional rolls around.
We're really glad that I can be stubborn sometimes
