Hi Peter, thanks for the reply.  I did not ask the man who is fitting the new door opening systems, but did explain what I was looking fr when my existing operators came to quote. They just wanted to renew the whole system.  They come to my home each year and charge £90 inc VAT to check the system. It takes them about 15 -2 mins and about each 3 years the battery is changed.  Time before last I remember asking the engineer to look at the garage and he changed the battery for me without charge. I did tip him though.
 
	 
 
	I just feel it unnessasary to pay out about £380 for a new  system for my garage when the existing one works. Even changing the control unit shouldn't cost that much (say £100?)  I would have been happy with a £150 ?