I'm sorry, I'm guessing you didn't see what I wrote Greeny on the "Sale" thread. We had so many orders (not just here but from dealers too), that those orders will be going on Monday, so you should get an e-mail from UPS between Monday/Tuesday. If anything comes up I'll let you know, but that is the shipping schedule right now (shipping department is not very happy with me right now with all the sales I did this week
Now to your question, you want to basically run a reservoir kit then, huh? We sell a resevoir kit, that adapts with a 8lb NO2 bottle. So I guess that answers the question - most people use an 8lb NO2 bottle. Now your going to have to run some sort of start/stop/hold system. Our kit comes with a pressure sensor and an extra solenoid among other things. The pressure sensor will sense the tank getting low on pressure due to multiple operations of the shock. Your original kit comes with a solenoid already, one of the solenoids will control airflow from the tank to the shock, the other will control airflow out of the shock.
The one thing you don't want to do is run a tank without a "start/stop/hold" sysytem, because you would essentially be running an expansion tank, which would make your air ride run HORRIBLY!