The wheels for my TICH have been fabricated from scratch as well using slices of EN8.
The slices were faced and a 1.6mm centre hole was drilled all the way through. This was used to locate the boss and was opened out after soldering, for the axle hole.
Below is a picture of one wheel with all parts in place.
The bosses and counterweights were made seperately and fitted within the inner diameter of the wheel.
Below is the result post soldering. I could not pickle the wheels immediately as the material used was EN8 and if subjected to quenching would have resulted in a hard brittle wheel that would prove difficult to machine.
I therefore waited 24 hours before scrubbing the excess flux off and cleaned the wheels up.
After silver soldering, the wheels were machined as per the words and music, using the fabricated backplate described.
Finally the wheels were sandblasted, degreased and masked up for painting. The first coat was an etch primer and then an aerosol to follow, using signal red.
There are still some sticky bits on the wheels from the masking tape used. In this picture the crank pins have been pressed into the wheels already.