www.makemkv.com

To be fair I just realised this round too that the purchase option is
existing (again? didn't see it before) also paying through paypal worked fine for me.

Without the ability to test before with the beta key I wouldn't have been here though -
so Thanks to Mike for giving us this option to test ...

Is there anything I can do to check for BDXL capabilities of the drive except trying to write a bluray xl?

I got this drive too, and the article description on amazon does mention bdxl compatiblity, plus there are people claiming to have written bdxl successfully with this drive.

It would be ...