The lower bracket design was a big step, that could slow you down and waste a lot of time if don't nail it right away. Everything has to custom and most of the time super tight fitting.
But I'm happy with this version... moving on, no time to waste... cause the tuning part is gonna be the biggest part, not the engine build or custom fab.
Jetting, variation, gearing, power and reliability... those are the real challenges that can consume a lot of time. (edited)