Strange how freezing a product can change the taste. A particular coffee-flavoured milk has a slight coconut taste in the background when served cold. Yet, when frozen & mostly thawed, it has a peppery taste. Of the two, I prefer the latter.
Today Gary Rosenzweig at Macmost.com released a YouTube video demonstrating how to use Terminal to change the location where screenshots are saved on a Mac. I tried it & it works quite well. But I don't need that method to achieve the same outcome.
Once upon a time (sometime between 2005 & 2007) I acquired a preference pane called (very imaginatively!) Screenshots. With this you can save screenshots to any one of 12 different formats 
and vary the location as you desire.
Naturally, that Preference Pane is no longer available, but I can report that it still works under Sierra 10.12.3.
@nitinkhanna Those two T6 screws are from an old HDD: They replaced others that were lost in the carpet pile last time I replaced the drive.
Operation successful. Pre-unibody MB Pro now boots from a SanDisk SSD instead of the faulty Kingston one. The hardest part of the swap was locating a T6 torx screwdriver.
Done it, the deal was too good to resist: my spare mobile phone plan was sitting at $10.05 on the pay-as-you-go prepaid rate, when data is used, it's charged at 5c per MB ($51.20 per GB) and is meant for very casual usage. But I'll need more and in just under 40 hours, the deadline for the carrier's special 1-year Super Pack ends.
The deal is available for existing customers who recharge online before 5pm on Friday. It costs $249, includes all the national calls & SMS plus a very generous 42 GB of data: that equates to 3.5 GB per month for a shade over $20 per month.
Mum's orthopaedic surgeon is not totally happy with the result but said today: "see you in about a year."
Speaking with my sister & brother-in-law (who are visiting for a few days) Mum confided that she was managing the pain a whole lot better than before the stainless steel joint went in. She recognises that there's only extreme pain when she tries to do things that her new shoulder won't let her do.
I'm glad there's been pain relief.