Hmmm, first off i would stop panicking!!
Life is all cool. What marker do you want to shoot? The only one you may have issues with would be the shocker. But this is easily sorted by running an inline reg such as the cp or the timmy reg and just adjusting the output into the gun. All the other markers i can think of should be fine apart from the angel 06/g7 because thay use a cartridge reg that im not sure if you can change.
Life is all cool. What marker do you want to shoot? The only one you may have issues with would be the shocker. But this is easily sorted by running an inline reg such as the cp or the timmy reg and just adjusting the output into the gun. All the other markers i can think of should be fine apart from the angel 06/g7 because thay use a cartridge reg that im not sure if you can change.