Controlling this with Z21 DCC Controller, sone difficulty so far Controlling the 2 arm GWR semaphore signal. Can changeover the arms simalteously but unable so far to put both to danger/stop. Will try to use another option on the Z21. Early days.

An excellent device, to be able to activate Dapols servo operated signals via normal DCC control simultaneously in conjunction with turnouts obviates the need for additional wiring and switching and is a significant benefit. Used in this way requires the supplied switches to be de-soldered from the connecting wires, but should pose no problem to the experienced modeller.

The 4A-001-002 Servo signal controller, makes adding signals to the layout nice nd easy. They work well Train Controller software and I'm delighted with the results.
Great Job Team!