well i tried to get some input on these servos in the radio forum..no response yet.....i am looking at either buying these or the 531's...not much of a price difference and torque is fairly close...i have never used or had digitals and am curious if the $8.00 price difference is worth it or not...what is the main advantage of the digitals...what more can you program into them with the hitec programmer that you cannot with your transmitter...the main difference i see in them is perhaps the dead band..what about holding power?