Gasman, in case you have not seen it, here is Karl’s post on making scales. It is based on Horn, but applies to most materials.
It is chocked full of great information and detailed photos. There is some good information on making wedges, with measurements as well.
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How to make a traditional set of horn scales ... the way I do it.)
BTW, thank Karl, for posting that, it is a lot of work to document the process in photos and writing, then post it, so that it all flows and all the pics are in order and working… Just saying.
Thanks Karl