Some folks have already seen some of my announcements, updates and discussions about a Prusa CORE One Mini on various platforms like Reddit. After a few setbacks up until November 2025, the project was put back to the drawing board for the third time

If there is one thing this stage of the CORE One Mini reminded me of, it's this: prototyping is not always fair and square. And in this case, that is meant quite literally.
I spent about a full day cutting each profile to length and making the cutout

A lot has happened in the meantime - this is the point where the CORE One Mini project finally left the comfortable world of CAD and stepped into the slightly more painful reality of sparks, sharp edges and metal shavings. Hours were spent on tasks t

While finalizing the XY motion system for the CORE One Mini, an issue came up with linear rail availability.
The distance between the linear rail holders is fixed at exactly 245 mm. The originally intended rail, a THK SRS12GN, is available in 220 mm

One of the biggest challenges in this iteration turned out to be the back panel. What looks like a simple flat part at first quickly became one of the most constrained areas of the entire build.
Because of the overall size reduction and the tighter f