Hey, maybe not exctly a RC question, but I hope you would be able to help me Ive started a Stewart platform project recently and came across a problem with servos.

youtube.com/watch?v=spwAOJUQ8mM

sorry for that crypto link, but I dont see another way of me posting a video as a new user ;/

They should be symmetrical in motion and although I control them at the same time I cannot achieve such a result. My guess is that it is because of poor quality analog servos which are Tower Pro SG5010.
Can u help me choose a propoer model of servo, so i can get the same, repetitive speed without a delay. I really need them synchronized. Thanks