Air Vent Butterfly Valve: To complement the heater motor speed modification I made a manually operated butterfly vent valve, to cut off the airflow to the windscreen outlets. No point in wasting 50% of the warm air. A bit of plastic pipe, a couple of sacrificial bolts, lots of filing and fettling, and a control cable from CBS.
Very pleased with the outcome, and because I didn't want to clutter up the dashboard configuration I mounted the control knob on the undertray just to the right of the driver's knee...
