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					Originally Posted by  apfubar
					 
				 
				yes you need a servonaut sound module... and the gear change sound is only available on the M20+(fwd/rev only) and the K40(1/2/3/rev)! 
 
Not sure what additional data they send down but it would be interesting to see if it could be included by a middle module for non servonaut speed controllers. 
 
Cheers, 
Ap 
			
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 Thanks for the info. i'll look into it further to see if there is a way around it.