Heavy Kimura Spacers
$20 a pair, shipped in US. Elsewhere, ask for details. Paypal preferred. PM me if you're interested.
These weigh about .3 oz each, or .6 oz total. The idea is to add more swing to a Kimura. They're made of tungsten/epoxy compound, which is pretty easy to sand or cut down, so you can make them lighter to better suit your needs.
Installation is simple, as they fit around the spacers already in the knife. They're pretty durable, but not indestructible - just be sure all screws are tightened down fairly well before flipping. Also, applying a dab of contact cement wouldn't hurt, and the inside surfaces are left rough to help with that (see pic). The exposed surfaces are polished.
These have been tested on a K2 and K7, and should fit everything in between.