You must be in Display Mode to change this setting, once in Display Mode, go to 'Set-Up' menu (on the 'F3' menu page), then change from 'SYSTEM' to 'MOD', make sure type is set to 'FH3' & 4 channels, then change the servo setting from 'NOR' to 'SHR'. Turn the Tx off the same way you turned it on, with the Display Mode switch.

Having said that, I also run a 5955/7955 & being as these servos are 0.18/0.15s servos, I really don't see it making much, if any, noticeable difference. Better to get a LiFe battery IMHO as you will get a guarenteed 10%+ increase in servo speed & torque, making it a 0.135s servo. Just a guess but I doubt changing from NOR to SHR would give as great an improvement but I could be wrong. Just that neither Airtronics nor anyone else has ever been able to quantify the actual increase in servo speed, to the best of my knowledge.

Maybe I'll change the settings & see if there is any difference that can be noticed. Or you do it & let us know what you find out nickdawg18.