Ah -- an aside: I just remembered why I hit this. Someone recently scored a late era RTH SML alto on eBay. It looked *maybe* goldplated, very hard to be sure, but probably not, and they got it for like US$800 -- a bargain. I was so tempted to pick it up and modernize the LH table, because SML altos are really, really good. 15 years ago, I would have, but today I have a Couf S1 that I don't think an SML is going to supplant, so I passed on trying to score that recent one at that price. But other than the C# tonehole location, the SML is a natural for a modernization project. The stacks are already up to snuff, and don't need to be improved, and probably the low Bb and B would be a breeze (to modernize in a "normal" way).
Worth mentioning, and on topic, roughly: I can see why someone would modernize an SML, i.e. they want to play an SML in particular -- that's their jam -- and they just want different keywork so they can get married to a particular SML forever. This is something that was part of my reaction to the Kondratov work in the past, when this thread was originally current: it makes sense to me to do this kind of work on an SML, because the horn's voice is unique and some people will choose that over everything else out there.
My second saxophone teacher -- very good player, an artist without a doubt, and also the best tech in NOLA for quite a few years -- chose an SML tenor from all those available for a good spell (a tech can basically have anything they want). Not sure if he still plays it.