wr m is great for 3bld, I use set mine up with angstrom lubes and dumped dnm to make it crazy fast. solves with m2 feel great. My set up is too fast for normal solving. The stability of the wr m can be changed by the spring compression system. Though making the cube more stable will make the cube slower you can always use lube. And if you want strong magnets all you need to do is buy other magnets and put them with the existing magnets.