Looking for a Zex or NX kit. Accesories would be nice too, like a bottle warmer, guages, purge valve, etc. Gimme some prices for all of you that have used kits that you want to sell, im too poor to go new. Also, since i am mechanically inclined, but not experienced with nitrous kits, is this something that i can install myself? i have any tool i would need, but im not sure how difficult it is, so gimme some prices, and lemme know if its something i can do myself. thanks