I recently picked up a pair of 1971 Heresy's at a great price. They were probably in storage for years as one had a missing grill and faded woofer, but the speakers sound great connected to my Nuera 3403SE tube amp. The cabinets were originally unfinished, but unfortunately someone hit them with a coat of clear finish years ago and they are marked up a bit, but I LOVE their "character". I would like to know if I can upgrade the K-22 woofers with Crites CW1228 speakers and still use the original crossovers, K-77-M tweeters, and K-55-V midranges. I did find a beautiful pair of original cane grills on ebay and can't wait to get the woofers replaced/upgraded. Any suggestions would be greatly appreciated.