Levers for BB7

They are adjustable
http://bike.shimano.com/media/techd...70/8E40A-BR-M970-EN_v1_m56577569830600525.pdf

Just like the speedial levers, only the adjustment is inside the lever on the blade itself. Seems less convenient.

Do you know what type of pivot mechanism the levers have (riveted with bushings or a sealed bearing or something else?)

I have Avid speed dial levers-replaced from my XT shifter/brake pods when I went with a new Sram X9 drivetrain. If those Shimmy levers have the same adjustability as the speed dials, your golden.

One other piece of advice, I run Power Cordz cables with my mech disc's. Absolutely no stretch, and awesome modulation. Those cables really make a huge difference over standard cables.