Take a look at this topic and the video. http://forums.maslowcnc.com/t/router-festool-any-experiences/291
If the depth-stop can’t be locked, the z-motor can move the bit out of the workpiece but not pull it back down. The Makitas I have seen on my search for a router, did not have that option. Check also the first part of https://github.com/MaslowCNC/Mechanics/wiki/Bosch-GOF-2000-CE,-More-Photos