Seems like your fighting the advice that has been given. You need a larger bore MC. Or keep beating your head against the wall. You are not the first person to encounter this with a 15/16 bore. Same as a rock hard pedal. MC bore size is to large.
Not sure how you're getting that impression, I haven't had a chance to go out to the garage yet, c so I'm answering the questions people have asked.
These calipers, apparently, are tough to bleed when used in the rear, so they had me doubting my first impression, which is a small MC. Just bouncing info off others before I make a move.