Bolt-in counterweights are a major plus feature in all of our externally balanced dampers. For example, if you purchased one of our externally balanced dampers and during your engine build procedure, you decide you want to switch to a neutral balance assembly, you don't need to buy a new damper. You simply unbolt the counterweight and you are good to go. Some of our competitors who lack this feature have made claims in some of their literature that bolt-in counterweights are a bad thing because they can "come loose" or "fall out" and "do serious damage." We have sold thousands and thousands of dampers with bolt-in counterweights, and we have never heard of one single instance where a counterweight has come loose or fallen out. It just doesn't happen. So if you have any concerns about this, you can forget about them.