This is going to be short and sweet. I have decided to use Whosawhatasis’ bar clamps in addition to his vertexes. They are here. I have done this for two reasons. The major one is the bars perpendicular have zero gap between them, as illustrated here.
There is a gap between the two bars on the Prusa Bar clamp, which creates a flex point which makes them break. I think this is for better spacing on the belts. Secondly, segueing into the next point, it is a very efficient use of material when they are fully touching. Overall I like this bar clamp better, and I believe Josef Prusa used it on his original Mendel remix with Igus bushings.
Oh, did I mention I am going to be over engineering and thinking every part of this printer? 😛
S. J. Kelly 