Cant bring up the left back corner

after 3h of working on this bed … The hint on this video didnt work. Only influencing corners B/C was possible (you can see it on the picture - best result was 0,36). But the corner D never moved significantly up. Any idea how i can bring up the back left corner (D) ? https://youtu.be/h7ZTq2dDTkM?si=FIrDPo3hxr18SqVU

3D Printers & a Whiteboard

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RatRig V-Core 3: How to Get a Square Frame

This video is for those who struggle getting bed meshed with their RatRig V-Core 3. Please feel free to jump to the chapter you are interested in. 0:00 Intro 1:05 about the v-core 3 frame and bed leveling 8:26 what to take care of in the building phase 9:17 the right square 10:09 build tips 16:50 adjusting the frame according to your bed mesh ...