sure Paul - I mix this for myself:
Pyrocat High Definition Developer (Formulated by Sandy King)
Stock Solution A
Distilled Water 75 ml (hot)
Sodium Metabisulfite 1 g
Pyrocatechin 5 g
Phenidone 0.2 g (dissolved in a very small amount of Isopropyl Alcohol before adding to the solution)
Potassium Bromide 0.1 g
Distilled water to make 100 ml
Stock Solution B
Distilled Water 75 ml (cold - dissolving this Chemical will create heat so the water should be cold to start with)
Potassium Carbonate 75g (dissolve small amounts at a time)
Distilled Water to make 100 ml
(I find it REALLY difficult to get the B solution dissolved properly at this concentration, and it often stays milky and thick. IF this happens, just top up with water to 200ml, it will dissolve fine, but make sure you use double the the amount when you mix up the working solution)
Use at 1 part A + 1 part B + 100 parts water at around 21 degrees. I tend to lose around one or 2 thirds stop film speed for normal contrast development and can develop most films for the same times - helpful as I can develop delta 100/400/fp4/hp5 in the same tank. My times/ temps/agitation is 21 degrees, partial stand = 1 minute full agitation, then 4 inversions every 3 minutes for 14 minutes.
There are other developers that are very similar and come ready mixed in solution (including he Pyrocat HD) - which include DiXactol, Precyscol, and Exactol-Lux. Some are available from the photographers formulary (
http://www.photoformulary.com/DesktopDefault.aspx?tabindex=2&tabid=9&CategoryID=31&langID=0)
and also from Peter Hogan (
http://www.monochromephotography.com/section255609_207612.html). There is also a range of Pyrogallol based developers that have similar effects, but they are more toxic so I tend not to use them.
These developers aren't magic bullets, and, to be honest, if you are scanning negs, I think you;d probably get just as good results from ID-11, but they come into their own if you are silver-printing as the stain adds further benefit to taming highlights, whilst helping with tonal separation in the highlight areas. A good resource to assist in understanding the process of Tanning and Staining Developers is Barry Thornton's book The Edge of Darkness:
http://www.amazon.com/Edge-Darkness-High-Definition-Monochrome-Photograph/dp/0817438157/ref=sr_1_4?ie=UTF8&s=books&qid=1262939017&sr=8-4There is a lot of discussion around the internet as to the real benefit of tan and stain developers, but I say try it out and see. if you are not seeing any benefit, then go back to your previous dev of choice, but I reckon you will notice a big difference. Negs do generally look thinner, but dont be fooled, the densities added by the stain is very deceptive.