I have the Piranha on my 60" bucket. It works great and they custom make every one of them I believe. When you check out they want exact measurement so it fits when you get it. 2 holes drilled is all it needs too.
I like the piranha bar. Drilling two holes is no problem. But the totally non invasive clamp on method offered by toothbar.net is appealing as well. I have clay and a bunch of rock here. Thought a more aggressive tooth may be better? Of all the bars I like these two due to price.