Mortise key post gauges ....
I have on order from EBAY 20 ERA blanks, which are supposed to be 5 and 7 (thin) gauge and another 10 of some gauge or other (thick). I have no idea if they are going to be suitable for what I have in mind, which is basically making each 2 in 1 out of 2 brass keys cut down, some music wire (16 SWG) and some thin brass tube for the tension-er shank of the tool, to make it co-axial.
Thank you .....