i got today Ultra LeicaR for my GH5-and my 28,50,90,135mm are not hiting d mirror- i dont have 19mm though-i remember first version of Metabones you had to shave of some metal pin on 28mm
I use the 19mm v1 (along with 24mm, 35mm, 50mm, 90mm, 135mm, and 180mm Leica Rs) with a Speedbooster without any problems. My guess is the v2 will be fine.