can a techmarine choose a servoharness has his "one other common craftmanship cybernetic". I wouldnt ask but since the sevro harness is located in the cybernetics part of the book...

A servo harness also requires a talent to use. And generally, when it comes to starting gear, the trend tends to be that you have to be able to use it.

thanks, guess i should have paid more attention to the last line.