[quote=samc99us]The difference between a pair of bullet blocks and the Nacra or eXploder (marstrom doesn't make these anymore) setups is the nacra/eXploder ring slides up into the block, so it isn't flailing around. This is pretty nice-the ring is always in the same place at the same time.
I haven't seen a nacra setup fail, but they are heavy. I do expect the rivets in contact with carbon to fail on the eXploder setup at some point. Probably a good reason to drill them out and replace with my titanium rivnuts and some titanium screws now.
For the money, you can't beat a shock block+ring of your choosing.[/quote]
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