I have had Montior 10 speakers for 18 years. Discovered last night that one of the tweeters is no longer working. (May have been out quite a while, but I have 2 sets of speakers on the front with the Polks attached to the ceiling, but may not have noticed because of this!) I have read that the best idea is to replace both of the tweeters with the RD0198-1 from Polk. Everything else with the speakers looks fine to me and sound is still quite good. Even the gaskets still look good. My question is "Is it worth it to do the replacement, or is it likely that other things will go wrong over the next couple of years?" I had already emailed Polk about what to do before I discovered this forum. Any other tips or things to do would be appreciated.