I have!Have you considered the Sigma 150-600mm C version? It should be lighter. My only hesitation with the Tamron is that they seem slower to update lenses if there are compatibility issues. Sigma is very fast in issuing FW updates especially if you plan on using it on your Z camera.
Truth be told, when you look at the numbers, I arguably shoot more with my Sigma ART glass than I do with my Nikons....FYI. The zoom ring on the Tamron lens turns in the same direction as Nikon, Sigma turns in the opposite direction.
If you shoot fast action and you zoom by muscle memory this is important.
I gave up on Sigma, as I kept turning the zoom ring the wrong way, and loosing shots. I gave it a good 20 minutes of use, then gave up on the Sigma in total frustration.
My lenses for fast sports, have to all zoom in the SAME direction.