I used the small bottles for a few races. With the stop and shifter I went to the bigger bottle quickly. I have probably 6 small ones and a pair of 2.5lb ones as well as a mother bottle. But did not carry the mother bottle in the trailer. We used a small bottle in the dragster for the SLE. Stratus has a big bottle as it has SLE, Shifter, Shocks and Chutes all on air