i do it basically the same as steve but i make my own punches/chisels from old hack saw blades .
i cut them about 3 inches long. i then sharpen the ends .
for the concave chisels i bend them around a socket .
this will allow you to bend different sized radiuses . I also do not cut stops in the tools .
What I do is lay the wire along the edge and with a black marker color along the upper edge . This gives me a reference line for depth .
I also do not glue the wire into the wood . When you file the teeth in to the silver or brass , yes you can do the same thing with brass and copper , even gold . it will hold just fine unless you snag it when you are filing. that’s why you go lightly . remeber your not removing wood here like you do with an inlay , your just displacing it or opening it up so as to accept the wire . when you wet it , it swells back closed , clamping down on the wire
When you put the finish on the stock , the oil will lock it into place even more thus holding it just fine .
I would also add that one should take care when working along with the grain . Dead ending with the grain will produce a small whisker crack . This doesn’t show with a dark stock . But if your doing a blonde , you will see it .
Also as to layout . This is ALLWAYS very important with carvings, engravings and such . But with engraving and wire inlay it is doubly so . Once you start your cut , its there . You will not be able to sand it out . Simply put , you have what you have . So take your time , draw out the layout . And then let it set , step back and consider it for a while before you actually start the wire