1st, I stamp leather while it is cased with water prior to staining. The same level of casing when normal leather work carving. Getting the press foot centered is important. Getting a thick plate on top and bottom to distribute the pressure evenly.
A pretty Holster for a non pretty gun? Kind of like wearing track shoes and a Tux.
If you are serious.. I might wonder if the retention dent into the trigger might be deep enough to push it????
I really like the black and the pattern together. You do not need to see the detail from across the room, you can better enjoy it up close where you can really appreciate it.