[EricH]

The general statement on Tetrix components requires compliance with other rules. If Tetrix servos are more than 4W, they don't comply. <G19> specifies the motor(s) as being the source of vertical motion. As such, if a servo was used, it would not be able to provide any vertical motion.

I think this question should be sent to Q&A: "Are Tetrix servos included in <R92-A>, or are they in violation of some other rule?"