Rob, what was the failure point?  The tracks for the early ones are very light weight compared to the later ones. 
 
 
Bob, I actually find the original spring bases and horsehair padding pretty comfortable compared to anything foam will provide.
		 
		
		
		
		
		
		
			
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				Jordan Baker 
RHLI Museum, 
Otter LRC 
C15A-Wire3, 1944 
Willys MB, 1942 
10cwt Canadian trailer
			 
		
		
		
		
		
	
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