Migrating from TNEW v6 to v7 in Consortium where each control-grouped organization has their own TNEW site

Hello--

Looking for the examples of successful Migration from TNEW v6 to v7 in Consortium where each organization has their own TNEW site. 

We'd love to see your post-migration v7 sites and learn about your migration experience and

--what best practices worked for your organizations?

--what "gotchas" did you experience?

--compare notes on our organizations--we are four, independent, sharing-a-Tessitura-database-control-grouped organizations, each with their own TNEW (site, content and customizations) also using TNMP v3

Any advice or information appreciated!

Thank you,
Laura