The new heater hoses are finally in place, coolant replaced, and no apparent leaks. It is amazing how unpleasant that job got to be. Access could probably be better, and I don't know why I didn't just cut the hose coupling in the first place. I was going to replace both hoses anyway. Duh. Replaces both heater core O-rings. That was an interesting process, as I was spending a lot of time contorting myself into the drivers footwell. I did manage to break some unrelated parts which necessitated some unconventional repairs, but that's another thread.
Regarding, the heater hose couplings: if you're doing an r&r, you should pay close attention to the images above, because you are going to need to be able to reinstall the same hose(s). If you're replacing them, cut the bastards. Don't spend any more time than absolutely necessary removing them. Oh, and that yellow coupling that the parts illustration shows (Eeuroparts, at least), that's just a protective cover over the coupling. Doh!
'04 C70 Ragtop (103K)
'00 S80 T-6 (donated @ 140K)
'95 850 (traded @ 120k)
'83 240DL (crashed @ 303k)
And then there's the '70 240Z and the '58 Chevy Apache, not to mention the motorcycles...
2013 BMW K1600GTL