Hello, what thickness of metal did you use for the flap that closes off the air flow to the radiator. I have a piece of twenty five thousands but it seems to flimsy and may bend when opening or adjusting the airflow. Thanks Don
I am fairly sure that I used .80 or .90. Contact Marty Santic or John Bender, they can possibly send you detailed instructions on this very useful mod.
I used 90 thousands (0.090")
0.025" WILL NOT Work. I believe Larry Geiger tried 0.040" or 0.045" and it was too flimsy.
Some of my photos and some info can be found here.