Yes!, from Ed:

"I use the JOBO ColorStar 3000.* With it I have control of the process - I can measure the lot-to-lot variablity of materials and the effects of other variables (temperature is one). I would be -- well not quite --- lost without this thing, but close. They are expensive (all "expensive is relative) but the savings in materials alone - to say nothing of time and frustration - will quickly justify their use."

-this sounds promising, Sean