I'm sure there are others that know more than I , but I Always put a spine up the open side of all mine That makes it three widths thick . Seems to make it less able to twist or bend . I don't use as heavy of leather than many do, this from a leather master from my past . He was of the belief that the saddle skirting he had seen was over kill . I also don't store my pistolas in the holster , but I do stuff some paper in them to hold their shape . I use" Art" paper that has no acid in it so as not to create an issue later on . Living in AZ . I don't need to worry about a lot of humidity . Anyway what's what I know , I think ?
Arley AKA Sorcerer 1