Some years before Migraine formed, two of us were in a grindcore band that put out a few releases. An EP and a split 7" with Skrupel on RSR, and appearances on two 625 compilations. Afterwards Sean went on to Warkrime and Ecoli, Mike formed Short Circuit and Post-Mortem Vomit, and Dan and Sean both joined forces with friends John and Chase to create Migraine. Apparently our grind origins have not been entirely obscured:

http://grindandpunishment.blogspot.com/2010/02/blastbeat-from-past-brutal-death.html