I'm not sure exactly where to address this question and perhaps it will help to have this clarified in the forum.
I have the GNT-T and every time I check for App updates I see a paid upgrade to the NA27-T. I have tended to ignore this upgrade because I also have the syntax module which is paired with GNT-T and I don't know whether that will break the syntax module if I upgrade. Notwithstanding that I also have the UBS with Apparatus and as yet text criticism has to be squeezed in between bookshelf construction and Greek
Now I see in the recent NA28 announcement email that a GNT28-T is available. I see that there is an upgrade to GNT28-T available from GNT-T yet this does not show up in me Check for Update even in Paid Upgrades. I don't know if that matters or not but it seems curious to me. Also there is a mention that the GNT28-T will sync with a forthcoming Syntax module.
All combined this prompts a number of questions some of which will probably be redundant when others are answered but here goes :
1. Are the Greek Syntax modules compatible with the NA27/28-T ?
2. Is the forthcoming syntax module compatible with GNT-T or is it specifically designed to work with GNT28-T ?
3. If the Syntax Modules are peculiar to a specific GNT*-T will the highly anticipated full NT syntax module be released for both variants ?
4. Finally, if one was to upgrade the GNT-T that I have to one of GNT28-T or NA28-T (given a positive answer to 2 above) will the current Syntax Module I have continue to work ?