For those who believe GR offers no value with these mods, have you ever compared a modified to stock loudspeaker? I've been modifying my speakers for over twenty years, I've found great improvements can be had with top flight film caps, resistors, inductors, internal wire, binding posts, drivers. Assuming all loudspeakers to be fully optimized in stock form may be wrongheaded.
Back in the day when I was running Merlin VSM-MM I started experimenting with Duelund VSF film caps in BAM and speakers, a great improvement vs the stock Hovlands. I spoke with Bobby (owner/designer) as to improvements I heard, Bobby had not yet heard of these caps and was none too happy to hear of my modifying his babies, yet he seemed interested. Low and behold, a few months later and Bobby's incorporated the Duelunds in the Merlins.