Thank you both for the recommendations.
Owly, How many miles have you put on the XRs? What's the tubeless set up like? Which tires have you successfully tubelesed' with them?
Only recently started running them, due to a new build. Can't yet comment on tubeless, as I'm experimenting/trying out three different tires on the surfaces I ride:- Compass Switchback Hill Extralight, Terrene Ellwood Light, and Innova Cobra Skin Superlight. Probably going to get the Schwalbe ThunderBurt Liteskin also.
Once I've settled on which to run for the time being, I'll set them up tubeless.