Ooopps! Too many beers for me tonight..manticle said:Wereprawn -alpha amylase is activated at higher temps (leaving more dextrinous, higher body).
Luke - long mash (try 90 mins) , lower mash temp (try 62) and just reduce the amount of crystal (try 5%). Make sure the yeast is fresh and healthy and you have plenty of it. Aerate the wort as well as you can.