Does anyone have experience with LCA stiffening plates?

I'm considering a pair of those stiffening plates that get welded onto the bottom of the lower control arm. Does anyone have experience with them? At $25 on ebay, it seems like a straightforward mission. Also, I'd appreciate any advice on what you may have done or seen done to stiffen up the K-frame to make it flex a little less. I wanna hit this stuff while I'm all apart on the floor instead of deciding to do it after I'm back together and driveable...

I appreciate it fellas...

Ken in Pa.