showed it over on a leatherworker's forum and they wanted to see the edge of the main seam.
So I took these pics...
They suggested the holster needed edge burnishing.
All sorts of different methods are recommended there - but I used files, sandpaper, spit, beeswax, a dremel tool with a sanding drum and a felt wheel, an old piece of turned ivory and plenty of elbow grease.
After that the whole holster was lightly sprayed with a sealer (Mop & Glow and water) then lightly waxed with Kiwi neutral and buffed with flannel..
and here's the finished product...