I've been using this M10 for less than a week, and for the first time in my life I'm getting shooting pain in my wrists.
Guess that's a "no".
Seriously, if Unicomp would just make an 87-key Model M, there wouldn't even be a discussion. Since I doubt that's going to happen this decade, I guess it's either Customizer, SpaceSaver or getting ripped off on ebay for me.