Ok so I have just discovered that a dimu not oriented correctly in regards to "flip" will make it appear that you have significant gyro drift. I would have thought that if flip was wrong it would show the M4 upside down or however it thought it was oriented. Guess I'm thinking of it all more like a real airplane and attitude indicator always aligning to horizon, whereas this needs to be calibrated to horizon.
Larry I loaded your params and am going to finally try to fly this thing again! Thanks everyone and sorry to cry wolf and make you listen to my ramblings- I hope this all can be helpful to someone else!