We have experimented with small vs larger blades. Currently these are very hot on rocks, especially deeper rock piles.
Painted and hard coated with UV blast. In the NE Pink, and Junebug as well as these two colors are on fire.
In the NW and Central USA, the Colorado blade is preference with a slow retrieve, Sangria Orange, and Pearl as well as the colors previously mentioned.
We have tested with a ball bearing stainless crane swivel, which out lasts and out performs the crane swivel.
some pictures of a few I recently sent out. Pop a 1/0 Black Sickle hook, a larger blade, and the Walleye of Central USA love em!.
Collarless is the preference about 85% of the time, and are easier to tie.