I’ve done it a bunch, pretty simple if you’ve got the correct driver (Wiha PL2) to remove the lugs and a standard watchband spring bar removal tool for the buckle. Just take your time so the tool doesn’t jump under pressure and gouge the material.
I’ve been tempted to get a Noir Kilim and do a swap myself but there isn’t a black deployment buckle (yet) and I’m not sure if a standard buckle will lay as nicely with the material given afaik the pin in the deployment buckle is vertical through the sizing hole, whereas the pin in the standard buckle curves at an angle.
Do have a Noir/Gold Twill on order which
of course is getting the swap.