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Great job Herby!! It's great this chain link modification keeps evolving (I remixed a previous version - http://www.thingiverse.com/thing:1003520 which was a remix of a version before that - http://www.thingiverse.com/thing:954170)
I like the redesigned chain links as they cover more area of the wires and tougher to break. I will admit mine weren't as rigid but easier to remove and replace (which makes them more susceptible to breaking unfortunately).
I actually been working on modifying the carriage mount on my design similar to your modification. As you correctly pointed out my design means you lose 40mm of print height and I have been thinking of ways to fix that. I love your solution but I worry I don't have enough slack on my wires to go over and around my stepper motor. Going to print out what you have done and see how it works for me.
Again great modification!!