There's a couple of things that can be improved on them - the top and bottom halves are slightly stepped at the back where they meet, and the washers are rather flimsy nylon. It's possible to file or sand the rear to even up the two halves, and swap the nylon washers for brass ones. I'd be inclined to use Guyker individual bridge pieces. Or get a Hohner B2/B2V (depending on how many strings you want), shave the wings down, and 3D print some wings for it.