@alexanderhendrickson Yes, that is absolutely possible. The whole idea of the CAN bus is to daisy chain devices along it. Just get the termination correct.
[speaking of not using a tool distribution board it says...] "It is also possible to connect a Toolboard directly to the Duet 3 Mainboard 6HC, 6XD, or Duet 3 Mini 5+."
Thanks, I've updated that to make it clear it can connect to any Duet 3 mainboard or expansion board.
Ian