While on the subject, I think I remember someone mentioning something to do with a mash that you can lower the carbs going into the beer.. I really can't remember what was said or find it via the search but would be interested if whoever said it would remember.
Hi Slugger, I think you maybe referring to the mash temps, if conversion occurs at around 64C then more fermentables are produced, which the yeasties turn into alcohol and CO2, but if the mash temps are held at a higher temp (67-70C) then more none fermentables are produced, giving greater body as the yeasties leave more sugars in the brew.
John Palmer explains it well:
How to brew Chapter 14-15