Here I am, resigning a part on my 3D printer. This particular part is the little box that's screwed to the back of my Robo C2 which accepts up to two strands of filament, is the end-point for one or two filament tubes and holds a switch (quantity one) to let the printer know when there's a filament run-out problem. In their design, there's a little circuit board (at least in mine), a tiny blade switch that's supposed to feel for the existence of filament and a tiny two-pin receptacle to accept the plug from the printer itself. There's a screw in the little circuit board. There's a corresponding screw hole in the part itself. The original part was designed, presumably, to minimize the plastic used (perhaps to lower the overall printer weight). There are lots of cutouts internally on the part which serve no purpose otherwise. In redesigning this part now, I realize that I am free to change a number of these original assumptions. There is no significant cost to me to print a dense part versus a sparse one (infill) since I'm only printing one it just doesn't matter. Cut-outs? Doesn't matter since I'm not interested in the weight difference at all. Screw hole for the tiny circuit board? How about glue instead since that's easier. ("But you'll want the ability to replace that later...") Will I actually do that... or will I just re-print another and add two more inexpensive switches and wiring? There are pairs of doctors now in the medical world who are working together across the country (or the globe). The first scans something and the second 3D prints that "something". Presumably the second doctor might be the one with more experience and may then relay what they're seeing from the model. Likewise, we might be able to troubleshoot a problem remotely, design a part and then transfer the STL to a local printing company, they print it and hold it on "will call" and the end-user comes in for their replacement (better) part. (It's like the new Amazon shipping/fulfillment centers, say.) All we need is some sort of 3DaaS (3D as a service) offering on the web, methinks.