I've seen some of those power tank monster valve set ups. What are the pros and cons?
For the valves:
Cons:
Expensive
had to drill and tap wheels
Pros:
Even without the powertank the tire does air up significantly faster from my garage air compressor
Airs down very fast
can set a gauge on the other stem while airing up or down to monitor progress
No real world experience with the tank yet but from what I've gathered:
Cons:
Very expensive - more than an ARB 12V pump
Refilling the tank costs $25 or so each time and can be time consuming
when its out- its out
heavy and bulky
the Co2 tank needs to be tested and certified every 5 years
Pros:
airs up really fast
has enough "umph" to seat tire beads
can run air tools
the upgraded regulator can also be used to air up N2 shocks if you have the N2 tank