I don't know the explanation, but I heard this about primo ace too. I tried making a batch at 50 mg/ml with the same recipe I use for (mostly) painless DHB cyp. It didn't work. It's too painful to inject at a reasonable dose. At least it works orally.
Doesn’t matter the ester only a small portion of EQ converts to dihydroboldenone and from what I know this conversion is minimal which is irrelevant. For example if you inject test base or test suspension it’s not converting to DHT at such a high rate that test base is basically DHT.