Crossfire tanks mostly, PMI Pure Energy, Air America, AGD Flatline, Kingmann Java, Centerflag, etc.
Delrin Turtle Mini Midget Autococker
e2 eBlade with Powerex 9.6V battery
Twisted products LPC / front block screw
CP Shorty HPR
Pulse with RF chip
45/45 Crossfire tank
Deadlywind Wisper carbon fiber barrel with full Freak set of inserts
More Expensive than most
Tank covers don't fit well
Despite being 6 foot 2 inches tall, I seem to like really short setups for my playing style. The 48/4500 is about a full inch shorter than a 45/4500 Crossfire and about 7 ounces ligther overall.
The CP Air high pressure output reg easily keeps up with 15bps ramping and should be more than enough for most markers out there. Since no one really makes a cover for this new style of stubby tank, you probably won't find a cover that fits well at this point. I'm using a Redz cover that it's too long and not wide enough. It fits and looks decent as I shove the excess length towards the front of the tank around the regulator, but it's hard to get the cover on and off in case anyone wants to check the hydro.
I bought my tank in May 2007 online. The bottle had a March 2007 date on it making it less than 2 months old. Unlike others that have reported leaks around their gauges, mine has not leaked at all.
One of the first things I noticed about the reg itself is that the end cap with the threads for the ASA looks to be very easy to replace in case you drop it or otherwise destroy the threads. As others mentioned, it should also be pretty easy to adjust which direction the gauge and fill nipple end up pointing once you have it screwed all the way into the ASA. The valve pin is also designed with a very high flow in mind by the looks of it.
A great reg from a great company with a very light weight tank in a new, stubby design. If that's what you're looking for, this tank won't disappoint.