Just for the record, if you find yourselves wondering, the Tektro hydraulic line for the Auriga/etc model disc brakesedit: WILL NOT work with the Shimano Deore lever and caliper BR-M615...
further edit: there is slight weeping at the lever connection. Dammit, it was too convenient to be true. So now it's the brake swap. Feck.
It has been my understanding that Tektro produces the Shimano brakes in their factories, and they sure look the same, so I figured I'd give it a shot seeing as how we had the Tektro line but not the Shimano. The Tektro is a cunt hair bigger (apologies to the ladies, but sometimes) but when I checked the connector bolts they threaded right in so I used the hardware included and so far it is holding oil and feels great! Well, yes, it is just in the stand. But I'm a ride that bike to work tomorrow and brake check the shit out of myself so hopefully all will be well in the real world.
If not, it's a last minute brake swap from the other bike. Cross your fingers, toes, and eyes.
Y Flaco es el hombre.
...and the trombone?!? Dang.