That is close to what I have...cobbled up regular floodbars with galvanized sheet metal attached.
The are variable and inconsistent. If they go on the same head every time, I'm golden. If not, they are a setup time suck.
I've probably paid for a set of decent floods that are exact clones of each other in the time I've wasted. Your shop might be a better fit for the ones I use, but I dislike them.