A “Whoops" That Worked
Several years ago I decided that I wanted to make a knife sheath similar to a mexican-loop style pistol holster. I went to work and promptly screwed up- or so I thought at first.
The knife sheath slid up and down through the loop I had doubled over, and wouldn't stay in place by itself. I could lace one side of the loop down to hold it secure along the welted side of the sheath, but the other side of the loop crossed the sheath at an angle; not perpendicular to the sheath as I had envisioned.
I looked disappointedly at my creation, until realizing that I liked carrying my own knives in a cross-draw position, and that the crooked loop on my sheath might work perfectly for that purpose.
I tried it out, and I'll be doggoned if it didn't look like I had planned the sheath to work out like that all along.
I made a few more sheaths like that one and eventually got a good pattern worked out for it that would allow the sheath to be carried both in the cross-draw and conventional positions. Thus, the Bookcliff COC-D (conventional or cross-draw) sheath was born.
What started as a "whoops!" worked out pretty well!