Transom Bracket- Jack Plate

My 17 Duracraft’s Mercury 60 is about 1./5-2" high on the transom and no more adjustment holes.

Thinking-=

  1. Jack Plate, maybe upside down. Issue-=$ and not meant to lower.
  2. 4" x 4" x 1/4" aluminum channel with holes at needed location. Issue, need more holes for further adjustment.
  3. 4" x 1/4" Angle aluminum with one mounted to each side of motor mount (2) and others mounted on transom with bolts to adjust position.

Suggestions?
Local supplier of 1/4" aluminum?
Is 1/4" strong enough for a 60?