I modified this brakes for my cross bike and so far the results are very Impresive, to the point I beleive they will work for tandem use so I'm posting it here.
Keep in mind I asume no responsibility on this modification (I'm becoming so american scare of ambulance chasers) since the brake arms are not design to be tread it at that point like you need to do to make them work, then again is more than sufficient wall thickness so for all practical porpuse I think they will for a long time..
Ps: If you are not worry about mud clearance or things like fenders, you can run this brakes using the typical V-brake horizontal set up, just move lower, in the case of the cyclocross bike you need as much mud and tire clearance as possible.
Now for the proper posting
Okay I got tired of adjusting Standard Canti brakes trying to make them stop a little better, so I end up hacking up a set of the newer XT brakes that I never really like, yes to see what will happen.
Yes I know my Hybrid front tire is lamme, I'm waiting for a Little Bro-deal coming soon
As you can see they have tons of mud clearance
I cut them about 3 milimiters above the spring retainer.
For the Quick release side I use a piece from a WTB canti brake, i just tap a 4 mm tread, shape the head of the bolt so the QR WTB piece will not come off no matter what (Shave sides) then I use a spacer about 8MM long (Two spacers from the rollers of a 8speed chain)
The quick release action is super easy.
More than sufficient clearance in between the bolts and the seatstays, at least on the Empella frame
Same thing for the back
Well the best part is that they work a lot better, no mussy feel at the lever, much more braking power,(I can not even run the RED pads in the front since they have to much stoping power)
I don't think they are perfect but for sure they are far better than any cantilever brake I have ever try.
I keep you guys and gals Updated when I find the parts to make prototype number II