Hey Proprog, thanks for all the help., like you can see here at TMO I am one of the first N900/Pebble fans I very much don't want to be a tech support PITA.
I used gadgetbridge to reset and upgrade to v3.8 firmware with my LineageOS tablet.
https://github.com/Freeyourgadget/Ga...rmware-updates
Which means I can now install pebble watch apps onto the Pebble, where before I couldn't. So seems 100% functional with Nexus7-Gadgetbridge
(snip me chasing wrong problem, I just reinstalled and verified proper MAC and maebbled worked!)

(edit)Does Maebbled pass on GPS and network connection to watch apps?(I will also look in the thread)