Step 3: Welding prep
This shoe has a steel shank under the insole for support, my shoe had the shank riveted to the insole, so the entire insole was removed from the shoe. The underside of the shank was abraded at the heel with a rotary tool, this will clear away any debris and prepare the surface for accepting a weld.
The heel cleat opening left a jagged edge which needed to be fixed. I easily cut away excess shoe around the cleat opening and then reinserted the shank-insole back into the shoe to approximated where I was going to weld my new steel heel spike, the new heel location was marked on the steel shank with indelible marker.