Madmax, that is a thoughful and well spoken response.
Mind you, I do prefer your design due to the fact the a press = release, where the Madbull will be burped everytime you un-screw. (A constant annoyance with their CO2 regulator/filler)
Still, kudos to looking at their design and realizing the difference. Hopefully this will lead to you pwn'ing their design with something even more new and interesting!
cough cough HPA adapter/regulator to fill at 100psi-3000psi or even a 2000psi shell 
-Daes