Gravity Group did the engineering/foundation plan/bent plan but the profile is the same as the original John Miller configuration as it was in Memphis, besides maybe some modifications to fit the new site. I'm not sure if it's M&V doing the construction or Green Bay's parks dept doing it in house.
Next week the structure for turn 2 should be complete; according to workers on the site they plan to be finished by Tuesday (11/30). Structure work will then begin in zone 3, this work should progress very quickly since the height is much less in this zone. They expect to have the entire structure completed by Christmas, the remainder of the winter construction will then consist of completing the track and adding mechanical elements like brakes, lift mechanism, and transfer mechanism.
They're from the Raceworld ride. They used all the mechanical stuff from it. Not sure that I like that they used all 5 cars though, especially seeing how it crawls. Think 3 or 4 would pace better.