Cant get left back edge high

i was working today about 3h and i found no way to get the left back edge (D) high although i followed this video. https://youtu.be/h7ZTq2dDTkM?si=-FKM34RBenNRq4wO has anyone a idea … i am a bit frustrated as i had allready 0,3 as you see on the picture

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 ...