[Carving concave face on salmon plug]

I am wanting to turn some basic diy salmon plugs. I would like to know if anyone knows how to carve the nice symmetrical concave face of a salmon plug. I noticed they are almost like a bowl and not just a swath cut through it. Anyone know how thats done? 

[Wire size(s)]

Hah! Good info. I have three different style of plugs here and wondered why some had bead chains vs hooks attached to the body.  Now i know.

[Wire size(s)]

I am new to the lure building and was planning on making some wooden baits but am liking what I am reading about PVC. I fish mainly Lake Trout, salmon and walleye. I was wondering what gauge of stainless wire people recommend for salmon and lake trout lures? Or is it better to go with a specific size of screw in eyelets?

 

cheers