I built a Dual X Carriage with Dual Z Motors a few years ago and want to upgrade to the newest stable version of Marlin.

This is what I am currently running, 1.1.0 RC3

Hardware is Oversized i3 with the following:
Azteeg X3 Pro with Viki 2
Dual X Carriage
Dual Z Steppers with Separate Endstops for leveling

Here are the questions that I have:

1. What version should I upgrade to?
2. Where do I find/put the pin assignments for the Extra Z and Extra X Steppers as the newer firmware just mentions that it will be assigned to the next E stepper.

I am not a programmer and it took me a few months to get it working the first time so I wanted to ask for help this time around.

Here is a link to my current firmware that is working (except for the basic buggyness). https://drive.google.com/open?id=1pPKD4ijfQ9fkFAYNaPhvg9hWHwB2qdae

Here is a video of the printer doing a duplication print if any clarification is needed: https://youtu.be/aOn0jR-iBpc

Thanks for any help you can give.

Edited 1 time(s). Last edit at 12/03/2017 08:53AM by mic03167.

It has been a few days and I see that this has been view a bunch but no one has posted a response.

Is there a better forum to post to with users that may have a better understand the Marlin firmware?

I also have same problem,i add two arduino stepper motor drivers and hacked my ramps1.4 to AZTEEG X3 PRO.but it only works well for IDEX on old version 1.1.0-rc6.So i also want to upgrade to use new version firmware use dual Z and dual x carriage,hopes someone can help.