TUCSON, AZ – Both Brandon Carlson and Darrell Midgley had mechanical problems Sunday which forced early exits from Tucson Speedways 10th annual Chilly Willy 150.  Carlson was credited with a 19th place finish after pulling off the track just past lap-105.  Midgley was placed 21st after heading to the pits before lap-80.  Carlson was extremely strong…