Simon,
In case you are curious, I read this list in digest form, so sometimes I reply before I see other people's replies posted.
However, In terms of this topic, yes, I read your replies on this topic.
In fact, it was reading your replies that motivated me to reply with a better solution.
In my opinion, yours approach is poorly designed, since it introduces a problem (notes to represent slashes that will be transposed) that then requires a solution.
The solution I disseminated avoids that problem in its entirety.
In my opinion, getting a slash by saying \rs is pretty tough to beat in terms of simplicity.
To each his or her own.
How about we just let the OP decide which is best for their purposes?
Cheers,