Beefed up remix of clampV2.scad so it works properly with the dimensions I wanted to use and slightly easier to understand language referencing the clamp rather than the 3D planes.
The best, flattest glass bed I could get off Amazon for one of my printers is larger than the heated bed, so I wanted to start with a strong universal clamp with the depth to handle the overhang, without being too tall to be in the way. I found a clamp that was pretty good but it had a gopro type mount on it that was wasteful for me - then I found it's source, and downloaded OpenSCAD and did some learning & hacking to really make the clamp I wanted.
When using the cusomizer, remember, the parts should not be created and printed assembled - it's for previewing ONLY.
Big thanks to all the contributors!
More customizable version: https://www.thingiverse.com/thing:3075868
Asymmetric glass clamp version: https://www.thingiverse.com/thing:3247690
Anycubic Kossel Linear Plus
For me 26% infill was the magic number that Cura 15.04.6 switched from cross hatched infill on each layer to each layer having the infill in one direction per layer, alternating. Appeared to jump up in strength at this point that I normally attribute to a full 30% infill. I used 1.2mm sides and top/bottom - so 6x top/bottom and 3x walls with a 0.4mm nozzle.
I made enough tweaks to the .scad code in OpenSCAD to warrant sharing so others can enjoy the way this works now, or doesn't - depending on the numbers. I wanted thicker clamps and the rest of the clamp parts weren't adjusting appropriately (screw length, hole length, etc) so I made the needed changes dynamic (where 10mm thickness had been hard coded) so I could re-share the code for others to adjust to their needs. I also wanted slightly finer knurled finish as the ones printed with v2 were hard on fingers when gripped tightly, and the point of beefy clamps is to grip tight. Finally the press plate was a bit too sloppy and loose feeling, so the tolerance between the ball and socket was made tighter to give it just enough friction to move freely without being totally loose, at least on my printer.
This .scad file is more customizable than this online customizer app will allow you to tweak things (added one extra adjustment - the nut-bolt difference factor to adjust tightness or looseness of the threads - although if you make it much larger it should work without much adjustment since the factor will scale the gap up too), so I encourage you to download OpenSCAD to really play around and also check out the more customizable fork of this linked in the summary.