[TowerTalk] tic ring in tandem

[w9ge]

Has anyone used the db9 port on the back of the tic ring rotator controller to slave two tic ring rotators?  I have one up and a second would be far less money than converting the tower to become a rotating tower.  If you have done so does it work well, and do the rotators pretty much stay in synch throughout 360 degrees?   I want to stack a pair of yagi's and have no need to rotate them independently.  Thanks in advance for the observations.  73 bob de w9ge