I just dug up the following from my e-mail archives. I don't think
Patrick or Nicholas will mind my posting it.

From Pat Gainer: "The PQGlycol that Nicholas [Twist] uses is 10%
hydroquinone in propylene glycol with 0.25 g phenidone for each 10
grams of hydroquinone. There are several activators you could use.
IIRC, he uses 1 tsp borax + 1 tsp sodium carbonate as activtor.
Dilute the glycol 1+50 and add the alkalis."

From an earlier e-mail from Pat: "Adding a little ascorbic acid to
the PQ-TEA helps. I think that, since PC doesn't need sulfite for
synergism, the PC acts as a catalyst to get the PQ going. Anyway,
it is a staining developer unless you add sulfite. Add 4 g/l to the
working solution and it's a pretty hot developer. My basic recipe
for this brew is 10 g hydroquinone, 1 g ascorbic or erythorbic
acid, 0.2 g phenidone in TEA to make 100 ml. Without sulfite, I use
it at 1+25 dilution for 9 minutes at 70 F. Add the sulfite and you
can use it 1+50 for 8 minutes at 70 F."

Jordan