Dennis
Thanks for the update.
I have previously used CDUs to fire more than one solenoid turnout motors per Accessory Decoder output, hence the question.? But to be quite honest with you The DR4018 is so cheap that I would just add a second decoder in the future.
I personaly have found that even a Peco PL-10 fitted to a N Gauge turnout can be a bit iffy at 12v so it is nice to be able to go to 18V DC
Colin