As of last weekend, my main 3 guitars have the FU-Tone 42mm L brass block in the Floyd Rose Tremolos. If you haven't heard about them, check them out at FU-Tone.com
When I used to see the advertisements for the large blocks, I never thought that it really worked. I ran into Adam from FU-Tone at a Music Zoo event. He talked me into trying one. At $50, it was a real cheap upgrade compared to some others over the years. I was 100% sure that I would be able to do it easily, and Adam went out of his way to make sure that I was comfortable. In fact, he said that if I had the guitar with me, he would put it in for free. I never even thought of bring a guitar with me.
So, I got home, and the new block was in a half hour later. As long as you know how to do your own Floyd setups, and intonations, the installation is a breeze. There is also a tutorial video that you can follow.
It made a huge difference, and the Kramer Baretta that I put it in became my main guitar rather quickly. I recently met up with Adam at another show, and he put the blocks in my other 2 guitars. Now I'm back to playing 3 guitars, not just one.
If you haven't checked them out, look them up. Really a fantastic product.
I just realized I sound like a salesman, which I'm not. Just a VERY satisfied customer.