No! You (and seemingly most others) have it wrong. Adv. Nutr. pH Perfect base nutes do not "control, " adjust or buffer the pH of feed solutions. In fact, the feed solution pH doesn't matter -- that's the whole point of pH Perfect [as long as you start with RO, distilled or other low enough salts/ppm water and don't add too much additional non-AN-feed-schedule high ppm/salt additives; a good reason to do cal, mag and silica supplementation by foliar feeding].
The pH Perfect technology makes the AN schedule recommended nutrients more bioavailable over a wider pH range, with the base nutes being better quality chelates and easier taken up and used, with pH variations not affecting this. Adjustment of pH with pH Perfect base nutes means you're adding more salts; weakening and counteracting the pH Perfect functionality.
I haven't checked pH in years. I use Eastern US river-sourced tap water at about 225-240 ppm (probably worse than recommended), pH ~7.4, with no pH adjustment, just bubbled >12 hours. I see no deficiencies, excesses or lockouts usng AN pH Perfect Connoisseur Coco Bloom A&B from sprouting till harvest (following a modified simple TaNg schedule).