I have two leather jackets that I attached threaded sleeves through the underarm seam underneath the liners. I slit the liners just enough to allow the concealex sheath to go in and out, and then put a hem around the hole. The handle of my inverted Yari barely protrudes through the hole. I use a long allen wrench to install/remove the screws through the sheath into the sleeves. I used black sleeves for one jacket, and painted the others brown. It ends up with a modest forward cant and is easily accessible. The only thing I'd do different is leave more of the handle exposed for easier access, or make the opening bigger to get my hand through. It is not noticeable at all. I have a vest with a mesh liner that I can weave any sheath into wherever I want to carry it, and at any angle. This allows me to vary my EDC, but lighter knives work better. The mesh carries the load so it doesn't print through the thick cotton vest. The hardest part about either system was the hem. The watch pocket idea works good.