2000c43

I did over the weekend. I should have an update and a how to in the next few days. So far works better than Catalina. I was never able to...

Yes. I got it working perfectly (other than no card reader and no WWAN). Here is my summary and links to necessary files. https://2000c43.com/

On my BigSur install, I have a SSD in the normal spot and an additional SSD in the ultrabay for BigSur. Works perfectly without any fiddling.

Strange. I didn't do anything extraordinary. I created the USB install disk, replaced the EFI on the USB install disk with the OpenCore EFI, booted from USB, went to diskutil,...