Currently 0.5 g hydroquinone and 1.0 g borax. I think if I add more borax the base fog problem is going to increase.

The high temperature is odd, but with development times of around 20 min., I'm sticking at 86 deg. I'm guessing that it has to do with the compensating effect of the developer. If it were more active, the highlights would develop more quickly, and it wouldn't be able to do what it claims to do in the patent.