Some excellent points. Regarding the cable splitters...

> In contrast the male end holds the cable with two set screws, but the entry 
> hole in the brake connect is much smaller than the exit hole and, to my eye, 
> just barely distinguishable from the derailler connect.  

I have davinci cable splitters and find no problem distinguishing between brake 
and derailleur easily. Not sure that the brand would make any difference but 
just throwing it out as a data point.

Regarding 50+ year old eyesight, I'm 55. This is my main problem working on 
bikes. This and diminished dexterty of my hands/fingers and loss of general 
flexibility (to bend and hold my body in certain situations while making 
repairs). For the flexibly part, I find myself moving the bike on the stand 
more often to get the best angle at the job. Good readers that don't slide down 
my nose and this http://www.lightsandknives.com/images/D/hl4.jpg are the best 
I've been able to come up with for the eyesight thing. I remain open to 
suggestions.

Also, as noted, I strongly suspect that a brake cable will not be be flexible 
enough to give optimal shifting performance. This may be most noticeable around 
tight bends such as under the BB cable guide to front derailleur. Also, could 
be that this is more of an issue with indexed shifting. I realize these 
standards were established prior to indexed shifting so maybe I'm wrong about 
the reason but I've done some experiments and the stiffness of a thick cable 
does appear to effect shifting IME.

• Perry

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