Well, my plan was for about 15 Pancake or similar holsters by the time I'm done. Likely for Glock, S&W Shield and Sig 320-ish. Sheaths, hmmm, probably 6 to 8 of about 4"-8" length (medium knives). About 2-4 belts of 1-1/2 x 38".
So ... are leather sides about equivalent to shoulder leather? That was the primary question, i.e., to use shoulder or side leather for holsters. I don't know if one stretches more or has other properties where one is better than the other for holsters.