I was also a bit disappointed to see this concept had stalled, when it was one of the first threads I'd read after arriving. I do however appreciate why, I think, in terms of the variability there is in end machine design. My thought was that a decision logic tree could be developed that highlighted the decisions to be made in coming up with a design, with the specific details being decided by each person. This is essentially what people who design anything do, at all points in the process. it is of course a potentially large undertaking, and still impossible to teach the process of how people fill in the specific details. However, there are some things that come up time and again in design review on here, and these are the areas where some tutorial decision logic wouldn't go amiss. I.e. steel frame design, z axis design, gantry design, etc. ...and now I'm rambling myself into an impossible corner.