Stand for Bicycle & eBike Handlebars

When you get a flat or need to do maintenance, flip your bike over so that it rests the seat on the ground, with these stands protecting the items clamped to your handlebars. 
Designed with toughness in mind so that it can support your lightweight racer, or the heaviest ebike.
There are six models to meet most needs.  Some of them require 5Mx20mm screws, and some use plug/hole design just requiring the two halves to be pressed together. 

Captain_Orange created an innovative handlebar stand which I admire, but it could not take the weight of my 40Kg ebike.  
I re-designed it by:
- modifying the hard corners where the pivot cylinder connects to bar (where stresses concentrate) into a smoother corner
- increasing the width from 20 to 25mm
- increasing the pivot circle from 16 to 22mm, which also increased the width of the bars
- adding the option to have a snap plug/hole which eliminates the necessity for having the right sized screws/bolt
- increasing the number of wall loops (2→5) and the infill percentage

You will notice the model global settings specify 2 wall loops and 30% infil. However selecting the model components in Bambu Studio will show layer height modifiers (0-8mm/0-12.5mm) specifying 50% to 60% infill and 5 wall loops in the Process->Object properties in the left pane. That gives it strength to the bottom half of the pieces on the plate, especially in the pivot area where the strength is needed.  For that reason I highly suggest using the 3mf file rather than importing just the STL files. 

The magnets are a tight fit. I put crazy glue in the holes and press the magnets into holes with plyers.

Use the thickest nozzle diameter you have, which provides more strength and better layer adhesion.  I used an 8mm nozzle on all models except just 6mm for the plug/hole version, figuring that would provide a better plug/hole fit. A 4mm nozzle will probably be OK too, since I over-engineered these models.  
 

Use blue Loctite on the bolt threads (just the last 3mm) otherwise the nut/bolt will progressively come loose each time you open/close the stand. Also don't tighten it too much as that will also cause it to break the Loctite loose when you open/close it.

The plug version requires no bolt/nut(s). It is a tight fit and I use channel lock (plyers) to press the two halves evenly together. It's probably better to use PETG since it is more flexible than PLA.
Two variants:
25mm wide & 16mm pivot cylinder 
25mm wide & 22mm pivot cylinder 
63 mm handlebar clearance, except the larger ones have 73 and 76mm clearance. 
Holes for 5x3 and 8x3mm magnets.