My PG interest in artillery vs. armor has to the U.S.S. Boise breaking up the HG division's attack on Sicily and artillery breaking up an armored attack on the 117th Reg in Holland, in 1944. In the Sicily matter, one of the armored columns came through a valley, and direction was provided by NGF's. The attack in southern Holland was similar, but an all army affair, of course. The question becomes, how to simulate that in PG, without excessively specialized consideration.
I don't know what
Mr. Rahman's motive was, but I thought his rules were excessively heavy on weapon caliber. As Mr. Schwarz alludes to the danger is in the number of shells of sufficient size. My suggestion makes a few heavy guns somewhat less effective. Contrariwise, too many small guns don't get much of a chance of any effect. Overall the effect should be less than Mr. Rahman's variant. That is the philosophy behind my potential variant.