I no longer build MLers but when I was doing such, a change of doing cast off slightly different was done...not a big deal, but different.
Never had to incorporate a whole lot of cast off on my builds because they were somewhat slender LRs...so I used only 3/16" of cast off.
The cast off was only evident looking down at the top of the comb ....there wasn't any cast off at the toe because the butt was slanted in. The unbent TG then lined up w/in the straight toeline perfectly. Looking at the Bplate from the rear, the slant wasn't evident.
Anyone ever notice if this was done on any originals?....Fred