Oh, and by the way, before my chronic fatigue kicked in and put me back to bed, I tried a little sight reading. Just to see what, if any, impact all this has had.
Not just the transcription work, but also the online tuition via @Zoltan Dekany's website.
I was amazed. I'm still nowhere near able, but the improvement was clear and unarguable. Playing without reference to the fretboard, looking ahead while playing, good finger choices, not confusing notes with those from the treble clef (a chronic headache) as often.
I really think it is all having a positive impact.
None of which would apply without the good people here on Basschat.