For the most part I think you’ve missed the boat for our hobby. Most of our applications are much better served by direct-copper MCPCBs. That term refers to a copper MCPCB that has had it’s substrate cut away, directly exposing the copper to the LED’s thermal pad. Take a look at Sinkpad and Noctigon to get more info on that subject.
That said, a product like that still has potential in some of our more niche applications. I’m thinking of Projects like tterev3’s MELD series. Nobody is going to make a direct-copper MCPCB for that anytime soon.
I noticed that your datasheet does not discuss the material beyond saying that it’s a “copper alloy”. It looks like brass to me, is that what we are dealing with here? Can you provide thermal conductivity numbers for your alloy? Thanks!