The author remixed this model.
*** update 11/2024: ***
Updated design - the handle now has a soft groove on the top and bottom making it easier to grip. Please use a temperature-stable filament - PLA is not really suitable here. I tried and re-printed the handle, since the PLA specimen got pretty soft.
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I used Lambomans handle design on my MK4, but when I placed my MK4 into the Original Prusa Enclosure, the handle would bang against the enclosure door from time to time - not ideal.
This re-designed version stays closer to the print bed and is more compatible with the OPE. It is not as nicely rounded, but also is an easier print.
For the OpenSCAD fans out there - sorry, I had a bad case of minkowski-itis ;-) You can have a look at the attached .scad-file to see what I am talking about.