Well I'm pleased to report we finally have takeoff! Fine bubbles after rousing this AM and full krausen tonight. That's five full days lag
I also bought a Copenhagen lager yeast vial too with the same use by date. Will be making a big starter at least a few days before brew day for that one!
Buy a 5L Erlenmeyer flask straight up, perfect for lager starters (or big ales) when using liquid yeast.