I sew my loops with a simple cross stitch, then sew them in however the regular stitch would fall. I can generally angle the needle after it's through. I frequently help the process with liberal use of 'Carpenter Words'! And I don't mean square, level or plumb.
I work construction, mostly road work now, but years of home building also. Obenauf's has been my go-to for the last 15+ years. Twice a week I treat my boots and they're good for the duration. GOOD stuff!
Merry Christmas all! Here is a prototype ornament I made. It was originally to be 4 panels, but my geometry was off, and it would have looked more like an apple.
So 3 sided. Will work on some more for next year.