Anybody using air shifting

A body said

I have two bottles…. but have only refilled one once. My bottle is mounted within reach so I can turn it off/on at will. I’m pretty much a hobby racer so saying the bottle has been in there for three years isn’t saying much. Used the ACD shift timer for years, but switched to the Digital Delay unit when I rewired the car. The air shift is much more consistent on my 1-2 shift for sure.

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Thanks for the info Jay.
I didn’t know you could mount the bottle horizontally. I am looking to use the digital delay Rpm controller too.
Thinking it will help my deal, and make it easier, especially with all the 1/8 racing, to pay more attention to my opponent and less driving/ shifting the car.
Any input on how much lag you see between where you have the rpm set and where it actually shifts? Buddy told me even with air, the 1-2 shift can be 200-300 different than what you think it is… in other words, he had to set it at 67/6800 to have it actually shift where he wanted it at 7k, obviously even more it you are shifting it yourself. I don’t have playback or data loggin, so was surprised to hear that.
Trying to somewhat put the Jurassic era in the rear view mirror