Another idea I've had is to have a parallel stream in one section of the GBC loop. Untested modules could be placed in this "probationary" branch, where a failure won't cause a major disruption of the whole loop. Tom actually has a systems of train stations which can accomplish much the same thing.
And also as mentioned in the Workshops at Brickworld Chicago 2015 thread, not everyone is part of a LUG with an established GBC operation. I'm looking forward to a page with GBC coordinator experience.
Personally, I would be very interested in more information on reliability, especially in the sense of parts breaking or wearing down. It's a bit unfortunate that we for the most part only get to see mechanisms that work.
I don't want to sound elitist, but I would suggest that at least a basic grasp of these things should be considered assumed knowledge for anyone wanting to get into GBC construction. I place it in the same bucket as knowing how to brace your structures (or at least, knowing that bracing is important), or basic SNOT techniques, or even that 3 plates = 1 brick.
I'm brand new to Lego GBC...
Is there a good compilation of instructions based on sets? I.e. To build model A you need set 1 and 2. I tried using Rebrickable to find GBC builds and couldn't find more than one.