Mike,
I had typed this up before but when I went to get pics it all went away, lol.
I finally found the right bin with the insulation in it. For some reason it is always the last one I look in, lol.
I put masking paper on the drafting table work bench and put the insulation on it. Not really a straight edge on it except the ends. One end was missing so I measured from vent opening and allowed for that.
I do not think a jute material or carpet underlay will ever work. Too heavy. It looks like the factory sprayed contact cement and put the insulation in place first thing. They had installed one of the air vents on top of the insulation in one place. If you use something heavy you will have to use some type fastener to keep it in place.
I will send Mike the first layout. I thought I was going to cut them out but best not to. I will go down the list of PM's sent and do as I have time.
Pics of the layout.
Also a pic hanging on wall in the workroom. I use to go to Ohio Truck during launch each year we supplied bunch of parts to them. Hanging on the wall in the Buck room was a blueprint of a Model T. I ask one of the guys if I could get a copy and he scanned and sent to me. It got crumpled up over the years before I put into the frame.
If someone was going to try to reproduce this they were made using a process called steel rule die sometimes called a cookie cutter die. They are usually made by sawing a piece of plywood with band saw and inserting a hardened steel blade in the slot. In the press it came down and hit the material and cut against a hard rubber surface or sometimes piece of wood.