Hiii!!
Is still cannot install Tumbleweed with Catalyst drivers?
Because I’ve waited too much to install it 
PD: I used to use Tumbleweed
The latest beta version should run fine on Tumbleweed. You can use Sebastian Siebert’s latest script to install it as RPM packages:
https://www.sebastian-siebert.de/
But the issue with GDM still isn’t solved. The script offers to install a workaround though.
If you need help with the page (it’s in german), please ask.
Thank you 