As Dan says, I have been through a few different digital full size servos over the last 18 months, from HiTec to Sanwa and KO's ranging from 0.12 to 0.08.
My 2143 KOs in both cars feel as quick and torquie (is that a word
) as any of the full size servos. One thing I have noticed is that the 2143 seem to react quicker, I have actually turned down my steering curve
