Hi Chris!
The major cause of the inner tyre edge wear is due to extreme camber change caused by worn out bushings in the upper arm.
The adjuster bolt-nut combo which goes through the back knuckle bushing does not contribute much to the wear, it affects the car's forward rolling behavior.
There are several adjustable camber kits available, which solves the tyre wear problem.
Hardrace
Cheaper Noname
Febest Left side
Febest Right side