Make a migration plan for Gadgets 2.0.
1 - make sure it's running on CTech labs instance
2 - test it on beta cluster
3 - test it on test WP
4 - roll out to smaller wikis
Write up the exact steps for switching a wiki and figure out which wikis would be willing to try it out.
See https://gerrit.wikimedia.org/r/#/c/247869/ for existing Gadgets 2.0 code.