It sure is. I'll give it a look through - stay tuned

Looks like the Sabertooth Movement Panel is compatible with the Cytron Smart Drive Duo in Simplified Serial Mode. Follow the instructions in the manual you attached to set the Cytron into simplified serial. Keep note of the baudrate and connect it to your EZ-B's UART port.

Thanks DJ.  So if I have this right .. both Sabertooth and Cytron Smart Drive Duo use simplified serial protocol and both connect to one of the EZ-B UART ports.  I understand that every digital port can be configured as one direction serial ie. TXD?? Eg. I could put my Sabertooth on D0 and my Cytron on D1.  Is this correct?  Or , do I have to use the dedicated UART ports UART0, 1, 2?

Then, do I select the same plugin (Sabertooth) for both my Sabertooth and Cytron modules?

1. yes you use the sabertooth skill to control the cytron. The Sabertooth Movement Panel is compatible with the Cytron Smart Drive Duo in Simplified Serial Mode.

2. I advise using the UART ports to ensure accurate data transmission. The sabertooth config control will also mention the same advice when configuring the control.

Also, i used the search on this website and found that there was a recent conversation with someone asking to use the same controller and about sabertooth compatibility. I advise you to read it here: https://synthiam.com/Community/Questions/Does-anyone-have-a-Cytron-Smartdrive-Duo-30-and-what-are-the-18219

DJ .. thanks for this .. so that I am clear then, rather than using any of the digital channels in serial mode I should use the (black) dedicated UART0 port .. but only the TXD pin?

Correct. There are three uarts. You can choose to use which of the the three are most convenient for your setup