[MetaEngineer]

My apologies for the ninja edits.

I read rules R90 and R91 closer and realized that there is no way to remove the regulator from the robot. The scheme in R91 doesn't really save any weight and severely limits your air storage to 60 PSI max instead of 120 PSI.

The diagram in Figure 8-14, R90, makes more sense, as it allows 120 PSI storage regulated down to whatever you want <= 60 PSI. Shifting may still reliable at lower pressures. If you do go this route, please report back what you find so others can more easily tune their shifters to use air more efficiently.

Keeping air tubing short between solenoid valve and cylinders will save some air as well.