Go to the relevant message, and click on the time or date indicator at the top right of it. That lets you copy the link, which you can then paste it into another message, like so:
I put a much more detailed thread about how I built that model on Missing-Lynx. But don’t copy everything I did there if you want an American prototype, because as I mentioned above, I made some changes (which, IIRC, I all point out in that thread).