I flashed 18.1 using BITgapps on my spare 910T and it comes right up. I first tried also flashing with magisk and it fails with an error 1. I use the backup unit for my RGT biking app. It crashes. Some of the setting hang and the the ROM is a long way from prime time as a daily driver. I'll flash the updates and keep playing with it. Thanks for the pleasant surprise.