Thank you Aris Rated 5 out of 5 stars

Many thanks for your kind and comprehensive answer with explanation. Shame that it is not possible.
Thanks again.

This review is for a previous version of the add-on (1.2.3).  This user has a previous review of this add-on.

There is a Metro+ project on deviantART, that may become what Glass fans want. There is no release date yet.

http://link6155.deviantart.com/art/Metro-335834397