KO 2123 is 0.06 though @ 7.2V with LIPO likely faster. I have 4 still as think they are great, specfically when recevier voltage is an issue (old Spektrum problem) being direct powered from the lipo is reasurring.
That said I have chosen to run a Savox in my 2wd now and KO2133 (older slower 6V) in the truck to smooth the steering out some.
I had a low profile Futaba servo and didn't like it, didn't feel it had the guts of the 2123 so went back.
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