Meridian Unplugged - Powered by MrTechGuy.co.uk Forums Discussion Meridian - Systems Looks like I purchased the HD621 too soon

I am an original buyer of the modified DVDO Edge many years ago. It still works but I wanted all Meridian equipment. When I saw one on eBay for what I thought was a great deal, I purchased it. To my dismay it was defective and I had no recourse but to repair it. That was $750 to replace the board and Marc Koval did the honors. I also want to give a shout out for all my fellow Hitchhikers who helped me through this ordeal with setup etc... especially Ron L...

Now the UHD722 is coming out and with a trade-in of the HD621, I will still have to pay at least $2000 to get it.
I wished I had waited 8 more months.

Now that I have gotten that out of my system. I see in some of the threads that there are other solutions
I just purchased a Sony XBR75 900E and I didn't think to think about whether the HD621 would pass 4K video.

(1) I have an Oppo 103 that can upscale to 4K but it won't play 4K disc. I don't know if it would pass 4K video.
(2) I have a Samsung Ultra HD Blu-ray player K8500 with video and audio out. I did connect the video to the Sony and the audio out to the HD621 and it worked. I had to adjust the lip sync. This is my worse case scenario so far.

So my question is: Will the HD Fury vertex or integral used between the Sony and HD621 with proper cables allow 4K video to pass from the HD621 to the Sony?

I am also open to other fixes.

Regards
Samuel