I just bought a used 2015 spyder RT that has stock seat but they added back rest.  Considering buying the comfort seat, but it would appear the comfort back rest is a different part number than the stock back rest (219400679 vs 219400689) which is basically throwing away a $400 upgraded and buying an additional $500 one.  Anyone have success using the standard back rest on the upgraded comfort seat?
				
			 
	 
 
		 
 
		 
 
		


 
 
		 
 
		 
 
		