Looks like you're doing good work...great stitching and good finished edges too. Just a cpl thoughts on holster design that I've worked out over the years. I try to keep leather away from the safety as well as the magazine release controls. Body movements pressing against the holster leather can and will inadvertently press either or both sooner or later. I cut my leather close to both controls, allowing the thickness of the leather to prevent actuation.
Also, most makers now cover the trigger guard, but relieve it at the rear to allow a full firing grip while the gun is still fully holstered. Lastly, a good, but not overly tight fit on the gun gives security...I fit mine tight enough to dispense with straps, loops, or thongs (as a civilian with no "retention" rules to abide). Some of mine are 20+ years old and still retain the gun securely.
Why no cant? The forward cant not only makes it quicker to draw but also easier to conceal.
My thoughts as well. The cant allows me to get a firing grip on the gun BEFORE it leaves the holster, and with a fully covered trigger guard, it's the best for me carrying OWB at 3-4 o'clock. If the holster had no cant, I'd be trying to rack my wrist back to achieve the necessary "firing grip". I've made a lot of holsters for self, family and friends and the "Avenger" style is our OWB universal favorite.
Here's Bianchi's version of the old Askins Avenger style...Galco, Sparks and possibly El Paso Saddlery make them as well. This style of OWB incorporates some fwd cant by using a tunnel belt loop plus a slot located behind the trigger guard. The slot pulls the gun's grip back in close to the wearer's body enhancing concealment, i.e. no grip bulge. The whole rig rides high, with great security, and minimizes the amount of gun/holster that extends below belt line.
Here's the back side of a Bianchi with a Browning Hi-Power holstered. The 2nd is my version, worn with a 1911 Sig. Note that the trigger is fully covered and that the cutaway design allows a full firing grip. My version has a bit less cant than the Bianchi. Best Regards, Rod