Update on Mills MRA-12 resistors: I replaced the other channel a couple of weeks ago. I hear more bass impact, a more spacious soundstage, and, especially, an ease of presentation. The MRAs even seem to have partially mitigated a somewhat “glassy” quality in the midrange. I can’t wait to hear the full upgrade!
Tom Thiel has placed an order for the custom caps but they won’t arrive until late June or thereabouts. The parts list is nearly finalized for CS2.4s. There are a couple of caps that merit A-Bing to determine which to use in the final design. So, probably late summer or later before the CS2.4 kits are available.