very interesting and educational, thanks again. Ive had two estimates/opinions. with all your valuable input i see they are a mixed bag. the high one $1700 did a good rendition on the axls/bearings/etc to explain the extra cost but then estimated only truning the rotors. the second guy with lower labor went with replacing rotors but said nothing about all the axle/bearing work. go figure. i suppose the 2nd one could have had the a&b work built in but just didn't go into it with me. If i go with him I will now be able to dig into himas a result of all this grat advice. thanks again.
len king soon to be a little rv brake savy