Mike, those are very special flies indeed! They are predominantly wet flies, which is a bit out of my knowledge comfort zone. Honestly, I would contact Davy Wotton personally and see if he can help you out if you don’t get a solid answer here. He would be the foremost authority on this genre of flies imho.
Email: davyfly@ozarkmountains.com
Mailing Address:
Davy Wotton
1802 MC 7001
Flippin, AR 72634-9564
P.S., I would love to know the answer. Please be sure and post a follow up if you get information elsewhere.