Fidelity Research FR-54 Tonearm. ANTI-SKATE???

FR-54 Tonearm came on dual arm tt I bought. I moved it to the rear board, to use with Grado Mono ME+ cartridge, 1.5g tracking weight recommended.

All is well, but, I do not see any way to adjust the FR-54 amount of anti-skate.

One dangling weight, thru one groove in a wire, that's it. Bottom of weight has threaded hole. Presumably weight can be added, but, how lessened?

On scale, the weight is 2.5g. To a bimp on the bottom of the arm, just in front of the pivot. Does that mean it is transferring it's full weight, 2.5g of anti-skate?

I want cartridge to track at 1.5g, thus want 1.5g anti-skate.

I could grind the weight down to 1.5g I suppose.
..................

Ideas?