As much I like the option to use software leveling I find manual adjustment to be more reliable and intuitive way to get your heated bed leveled.

I designed a compact, low profile and adjustable heated bed mount for Kossel Mini which also includes a thermal insulation that will help to improve bed heat up time and ability to reach higher temperatures which are needed for printing ABS.

This thing is currently designed for quite precise 170mm diameter aluminium printbed, but glass may be work as well although the tolerances are pretty small.

If anyone wants, I can share the *.SLDPRT files as well.

E1: This system probably benefits form nylon insert lock nuts if you are using weak springs but with the proper springs the tension of the turning the screw is OK.

E2: I noticed that not weak springs that I used work well for printing but they make removing the print difficult since the printbed is quite loose. I ordered proper springs from Aliexpress (https://goo.gl/CpnWXm) and hope these are going to make a difference. - The springs arrived, but they were a bit too long for my M3 screws so I had to cut off about 5mm. In retrospect I would recommend to look for 15mm springs. Performance of the springs is very good, now the build platform is very sturdy and easy to adjust.

E3: Maybe in near furture I'll make my modification of Kossel corner pieces with the integrated bed mounting holes. Then the whole thing will be more compact and minimal! - I have my modification of Kossel corners ready but I would like to improve it further to improve the building process.

E4: I made a slight modification and added slot to apply some tension to the print surface, because I experienced the situation when bed rotated inside its holder. Also I added some additional holes for fixing plate A and B. The new V2 part should definitely be printed with ABS, because PLA will soften over 50C and lose it's flex.

E5: Added bed holder v3.1(B) which includes a nut trap for easier use. This version eliminates the need of cluing the nuts to the holder. v3.1 is for the M3 self locking nuts and v3.1B is for regular M3 nuts. Although self locking ones are recommended since they're harder to turn which allows finer adjustments, also they will not come loose due to vibrations.

E6: superjamie pointed out that I was missing some nuts on the heated bed holder. So that's fixed now. Added nut traps everywhere I could to ease up the assembly. No more worries about nuts falling out while trying to put this thing together. There may be slight loss of adjusting space due to the nuts near the adjustment screw. When adding supports to the part two try to keep nut traps without support. With part B slight drilling (0,3 mm) is required to create hole in the nut trap.

If anyone wants to remix then I can share the Solidworks file as well. It's bit too messy to put it up to everyone to see. :D I designed this when I was quite noob in SW.

• I could design a version with a thumbwheel for a quick adjustments, but I don't know if anyone would be interested in this kind on thing. Let me know if this addition would be good.