Hi
I agree, simple things often work the best.
I've been driving the car around today, the weather was not all that hot today but I've noticed a difference, coolant temp always sat about 90 degrees, now its sitting around 82 which is just after the thermostat opens.
The thermo fan usually comes on if I've been sitting in traffic for a while, it didn't come on today at all.
Non 1302 or 1303 owners may not get what I'm saying about removing the deformation element from the front of the chassis.
The shaded are is where the deformation element usually sits, I had this section open so air would come into the grille and go back out bottom, not actually doing any work.
Steve