I actually made something similar to a tremsetter that looks better, works better, and replaces a standard trem spring with no modifications to the guitar. I made it nfrom a bolt(I had no steel round stock so I turned down a bolt) an aluminum bar, some random springs, and a piece of brass all on my lathe in about 2 hours. it looks like a finnished professional product and I could have made some of it easier with existing stuff at a hardware store. way better than a tremsetter imho, I only think the systems with a spring loaded plunger that get bolted in the spring cavity are better but then you drill holes in the guitar.
well now I look at this and wonder who is smarter. I engineered a contraption for about 4$ in material and spent a few hours machining it, you spent 4$ and 2 minutes for similar results and completely embarrased the tremolo-no while I only prettied up the tremsetter and had to engineer it from scratch. I think its genius! great job.