I do have the 440 source girdle kit on this new build that is going together right now. A good friend of mine is also building a bb stroker snd he got the Bcr kit. It is much , much beefier and very well designed. If i wasnt so far along, i would have switched to the bcr kit. It is 1/2” vs 1/4” thick i believe.

Im sure the 440 source will help somewhat with capwalk, but the Bcr kit is much, much more rigid.