Agree with BB....100%. Iso's, and the push-pull thing with a somewhat workable theory, wasn't the answer....it was Dr. Feelgood, aka: Ziegler.
The old IronMan magazine (Perry Rader) put out a similar iso rack. With many articles devoted to rack push-pulls in his magazine.
Can't believe how narrow that rack looks and holes about every 3", or so....judging by the picture anyway.