http://forums.usfirst.org/showthread.php?t=11773
I've been vindicated (regarding 2 safety relief valves)
Not so lucky on part 2 though -
Regarding the High-Pressure Regulator question - the checklist is wrong and needs to be fixed. Thanks for the catch! The same error actually occurs for the Working-Pressure Regulator checklist item. For starters, there isn't actually any need for a 120PSI regulator since it's the switch and relief valve that "regulate" to 120PSI.
I don't have a good excuse for the error. Whoops...
Rule R73 doesn't require that any regulators be present on the robot. Rule R75-D suggests that the Norgren 60PSI regulator may be off-robot and further requires that, if the Norgren regulator is off-robot, then the on-robot accumulators must be limited to 60PSI.
I'll update the checklist (I'm sure that this won't be the first time).
Sorry for any confusion.
Russ