Hi Steve,
Forgive me and I will look at the previous thread.
The adjuster sounds like the bottom snare attachment, one either side but I will have a look at your previous thread pics first. If it is it will basically go half way through the drum, if crested the crest background would end at this line, rear half of drum being wood or brass. That probably sounds confusing but at worse I will take a pic of my old rm drum here.
As said lovely piece.
Cheers mate and will get back to you
Gra