About 15 years ago, I bought two Minimus 7 upgrade kits from an ebay seller who sold hundreds of his kits. He has since disappeared and I think he may have passed away. But his kits got rave reviews. He sold his crossovers for Minimus 7's and maybe other speakers, not sure. But I bought 2 different kits. One for a Minimus 7 set and another for a Minimus 77 set. Both had his self-made crossovers and metal cone woofers and then the idea was to use the Radio Shack tweeters, which are fine or good actually. But he asked me if I wanted a couple pairs of M&K tweeters for free and I said "sure!". He also included some custom-cut mounting boards to match the original tweeter mounts. That was my first ever hearing about M&K. They sound better than the Radio Shack tweeters, so that made me a fan. And then later on, maybe 5 years ago, I purchased two more pairs of those tweeters and his Minimus 7 crossovers (these xovers use the original Radio Shack woofers) from him.