Drilled Brake Master Cylinders

Before drilling the brake master cylinders that are on each brake pedal, I had to align the bottom of each rudder pedal. I used some scrap metal channel that's used for shelving. Worked as if it was made for the job. It fit the bottom tube of the rudder pedals perfectly. Others suggested using aluminum angle but I didn't have any small enough. After I clamped them, I clamped a straight piece of wood trim to the top of the rudder pedals to align them and tilted them forward slightly before drilling.