The only thing I had to do with an air release was adjust the return spring.
I was trying to use it with a Pentax A3 for drive-by photography (as you can get some very different perspectives from a camera poking out of your car window) but on test it kept holding the shutter button down for two or three shots rather than releasing it as soon as I stopped squeezing the bulb. The A3 is an oddball in that it has an auto winder built-in and uses a standard cable release, the other Pentax bodies use dedicated remote releases (hence why I used it).
I stretched the return spring and it worked perfectly for one roll before the camera split a drive gear. Oh well, at least the air release fits all my other manual focus bodies!