Do you use your DB killer?

[seangee]

Just curious. Mine comes out for a dab of copper grease on the retaining bolt every time I do the exup and I usually wait a day or two before putting it back. Neighbours confirm they can tell the difference but it doesn't bother them as long as I keep the exup closed. Since it is a large can (Quill evo) it sounds pretty good and not too loud below 6k which is where commuting happens anyway (mostly  :b )

Will be going back in this afternoon.