@neptune: PR is not required to fill water balloons; any blaster can do it. It requires a correctly shaped nozzle, obviously, but that's it. The unfilled balloon storage compartment is not a bad idea though; saves pocket space. I'd still opt to use pockets so I can switch blasters without loosing the balloons, although at the same time I also wish that every single blaster made had an appropriately shaped nozzle for balloon filling. (Have to mod that in, unfortunately, or carry a balloon pumper.)
So with that said, I'd like BBT to look at using nozzles for water balloon filling. The current nozzles should be correct/usable for filling balloons, but perhaps it could be optimized. Plus, it's a selling point for the blaster that theoretically doesn't really cost anything to implement. (Well, you have to change the molds to optimize the nozzle design, but it doesn't cost more in terms of materials.) Think about it: being able to say "Also fills water balloons." on the the box, accompanied with the picture. I'm sure the marketing team could figure something out with that.
Now, I'm still really not a fan of having intake tubes in air pressure chambers, although that topic's been beaten to death already and BBT might have improved intake on the Colossus 2 without me knowing.
Pumps. Still need to try out the Python 2 / Colossus 2 pumps, but other than that, my favorite pump designs are currently those on the Vindicator and XP 150/SS 300. The idea is that you want the pumping hand to be able to support the blaster at the same time, which the first Colossus had slight issues with.