All suggestions from this forum (except for Jenn's last ones) are added to the list as of this post. Thanks everyone.
The letters of the alphabet were also added as uppercase letters and as uppercase capital letters in quotes. Additionally, the letters , "N", "E", "S", and "W" were also added with all combinations of upper and lower case, with single and double and with and without trailing periods.
I will add all the above to the sandbox test rig as soon I as get a chance.
As Jenn suggested (thanks Jenn), all the slashes have been removed in the rig and replaced with commas, so that after the next map updates, it should be easier to understand the TTS output. Currently it is a very slow process.
The list now includes results for the initially submitted abbreviations from "A" through "H".
In my above post, viewtopic.php?f=10&t=15178&p=144296#p144296 i've updated the bottom "side note" to include another playback trick to keep the pitch understandable.