So they do exist... Get a website for them if possible.
Might
send one in at a time for cleaning if not also buy an extra (they probably have extras available), so as to both have emergency
dimmer and one always in each slot while the others are in for cleaning. I agree with the concept of cleaning them.
Hmm, 30 years of gunk and you have problems with what one of them? I would say that that's fairly solid state engineering. The Sensor rack dimmers might last that long on a constant basis, than again might not - we will see. In the mean time, you have dimmers that have lasted all of these years dependably. No reason they can't last another 30 or more years if maintained. Do you have some form of major advantage you can cite other than working or being new the
ETC product has over that of the installed
system by way of how the
dimmer functions?
I'm sure you have lots of other things to spend your money on than
dimmer racks. Perhaps just keeping them would be better and wishing for other equipment instead as a goal might be a better use of limited cash.
For now still, if they know all about them,
send them in a card at a time and get what is needed fixed, than the rest done by way of PM and cleaning.