Homemade Adjustable Strut Rods?

I would only cut about one more thread and see how it acted. How many did you cut?
It only loads the front bushing on braking and keeps the LC arm square.
Rear bushing only compresses on braking in reverse, a minor consideration.
If you cut a few more threads and it took up exactly the amount of rubber compression over time without pulling on the arm, then no problem.