RCFlyingKnight
New to GSN!
Hey Roger,  See attached picture for how I figured this was.  I can't see this as a oil/air pressure dampening, more like piston pushing against a cushion. The dimensions I got for the strut is best guess scaling your picture for a 4" wheel. 
My idea isn't fesable after actually drawing it out. Sorry I couldn't help,
Matthew
		
		
	
	
 
			
			My idea isn't fesable after actually drawing it out. Sorry I couldn't help,
Matthew
 
				