Nice work on the holster =) One thing I would change (if anything needed to be changed) is the position of the artwork in relationship to the straps. Your fine artwork is being covered by untooled straps with snaps. One thing I like to do with my work, is lay all the pieces out and try to design my artowrk around where the straps will lay, if the artwork is too large to work around the straps I will continue the artwork into the strap. That way if the strap has to go across my artwork, then the artwork isnt covered. Here is an example of what I was speaking of... When this purse is closed it covers some of the artwork tooled into the bottom, so as I have the pieces all cut out, I simply laid the cover down and continued the artwork on it.... that way no matter if its open or closed no artwork is covered.
Awesome job on the holster!