Thanks Tom. Apparently this is a delima with most Coaches. I did some research and found these
http://www.rvprobes.com/howitworks.htmls. Sort of pricey but I found them on Tweetys.com
set of Black & Gray w/ shipping for the price of 1 on their site.
should be puttting them in and checking how good they really are.
I've read nothing but raves about them. Will let you all know.