Knowing how to make an item doesn't make that person some wise oracle on its use. A blacksmith can forge a sword, that doesn't mean he has the slightest clue how to use it. After reading the OP's three related posts my general takeaway is that he doesn't like appendix carry and doesn't like striker fired guns, or at least finds them somehow less safe to carry. Now I've owned and carried lots of holsters for lots of guns and can't say I have a single one that a third party could somehow fire in my holster, at any position. Also if my holster or firearm are not in optimal working condition it's MY fault, not my holster makers or my gunsmiths. If you don't like striker fired guns then don't carry one. If you don't like appendix carry don't carry that way. If you are a holster maker and choose not to make holsters for that method, that's your choice. But stop preaching to everyone else trying to tell us we're wrong because our opinion differs from yours.