[hg273]

The blue box under <R69> reads "The compressor may be mounted on the ROBOT, or it may be left off the ROBOT and used to pre-charge compressed air in the storage tanks prior to bringing the ROBOT onto the FIELD. (emphasis mine). Additionally, <R70> says Only the compressor,relief valve,pressure switch,pressure vent plug valve,pressure gauge, storage tanks, tubing, and connecting fittings may be in the high-pressure pneumatic circuit upstream from the regulator. (emphasis mine).

As I read it, we're allowed multiple tanks. I'm guessing that FIRST will release a correction, defining how many tanks may be used, but unless that's cleared up, there's no restriction.

I hope this helps!