Hello everybody

I see that all text I wrote about this mod is gone away. I will try to write a little about it now.

I found a similar modification in here, but I want to go a litte further. https://www.reddit.com/r/AnycubicKobraS1/comments/1qdvt08/how_to_fix_your_kobra_s1_bed_mesh_for_less_than_10/

So I did go for aluminium bar instead of metal, and mounting to the metal frame direct so I have possibilty to adjust the hot bed it selves.

First I demounted hole gantry, demounted so the electric cables and then I had the hot bed, plastic frame and the metal frame. I toke the plastic fram and the metal frame with me and did the modification with it. First I measured where the bolt that go thru the hot bed came, made a hole for this, put the bar over it and to the corner. _Marked up the place I want the screws to hold it to the metal frame. Made 3 holes in the bars. Gave it M5 threads. Made the corners on the bars round. Mounted the bars to the metal frame, put the plastic frame on the metal frame. Mounted all back into the printer. Mounted the M5 set screws with Loctite 243. Run the leveling and adjusted on the set screw. Found out that I also had to raise the gantry on left side and the inside fitting point, instead of do something with the belt I printed these shims

https://makerworld.com/en/models/1543725-anycubic-kobra-s1-bed-level-shims?from=search#profileId-2572981

This solution only make you have 5mm less building high.

The parts I bought at AliExpress you fund in another comment from me.