On/offs ASA's are one of those items that if you've never used one before then it will seem like totally a luxury. If you use a marker that has one for some time then going back to not having one will be bothersome to say the least. On/offs do a good job of helping to reduce wear on the tank threads plus the ASA threads and also saves you some time putting on/taking off your tank. My Azodin Blitz didn't come with one and every time I use it I can barely wrench the tank free from the marker because of the pressure.
Edit: Forgot to talk a little about speedball. Using a mechanical marker in speedball will always have IMHO more disadvantages then advantages. It depends on what position you're playing and really the pace of the games that you are involved in. I can just see your trigger finger getting really tired after just one game. Check this video out (start at 26 seconds in): http://www.youtube.c...h?v=clIJV02bojk If you're playing hardcore speedball then the Enmey may not be the best choice out there. Certainly doable of course, though.
Edited by Jweb, 13 September 2013 - 10:50 AM.
I kind of like neck shots, they give other people the impression that I have a social life.
Meeting Mike and Willie = best paintball day ever.