Well, I've thought this out some. This leather, it was pretty thick to start so what I now have (2 sides glued together) is like the sole on a shoe. If I go with the Mexican double loop there will be 2 problems, one is getting the loop open enough to insert the pouch. Even if I can do that the loops over the pouch will be really thick and not look correct. So....I've decided on the sewn on loops- Buscadero style. The idea of cutting vertical slots and having the loop on back on the skirt was because I thought the loop between pouch and skirt would hold the pouch away from the skirt but in thinking this out, if the loop is sewn far enough- side to side (to the skirt) the skirt then folds a little around the pouch so it looks tight together. I'll still have a really thick pouch to pull through the loops but I'm thinking it will work. The reason I was thinking of the vertical cuts in the skirt and bringing the loops (straps) through the skirt and attaching on back was I could sew the loops easy after they were around the pouch and not worry about pushing the pouch through sewn on loops.
This is going to be a "using" holster. On the finish I was thinking of a 50/50 mix of neatsfoot oil and carnauba wax. I've used that on knife sheaths and it darkens the leather a little- to a light russet color. If I could burnish the edge black, that would look great but I've tried dying a burnished edge and found it hard to do and to keep the line of dye straight.
Once again, any suggestions very much appreciated.