Been a while since I have made a post! But I got my Mario cylinder yesterday in the mail and it is now time to start building I guess. Their is a pic of the valve and cylinder on my profile. I need to order the fittings that I will need and another on/off valve to meet the RFL rules. Anybody know a good on/off that is rated for more than 600PSI? All the ones that I have found on McMaster are only good for 600. I orderd 2 of the new banebot gearmotors for the drive.. ( http://banebots.com/osc/product_info.php?cPath=36_63&products_id=224http://banebots.com/osc/product_info...roducts_id=224 ) I also have a 3 cell 11.1v 2600 Li-p batt that will make this beast move. The shape will be kinda like the auzi bot I think. I am also going to get a little RC gizmo made that will open the vlave for a set time, in order to save Co2. I will just hit the button on my radio and the valve will open for .5 Seconds (or whatever time I want) then close again. It will also boots the voltage to the vavle @ 30v. What do you all think is a good time for the valve to be open? .5 seconds, .3, 1.0, .43957693? With any luck I should be able to fire the cylinder in a week or so. Any tips or comments are welcome. Thanks!!!