A blind guide work contact tip for mounting to a drive probe of a fastening tool is shaped in a manner which allows for an angled nail placement, such as 45 degree into a workpiece. Pressure actuated friction elements establish torque flow paths in transmission gearing as they are selectively engaged and released. The control system comprises an engine control for controlling the compression ratio control mechanism and the ignition timing control system so that when the engine is cold, the ignition timing is retarded largely from an MBT point and the compression ratio is set higher than that obtained when the engine is cold and operated at corresponding engine rpm and engine load. The program module is then terminated and restarted.