Last week my drill block parts arrived, so today I made the block. I cut about 3 inches off the foot long section of aluminum bar. Then I spent time squaring up my drill press, which meant fiddling with the table to get it sitting perfectly square. It had been about 2 degrees off level, it turned out. With the table square, I drilled two holes and inserted two of the sleeves that correspond to the holes a I need in the aft bulkhead. The holes came out pretty square, this should be great for helping keep the holes straight.
Finished product. On the other side is a channel for redirecting shavings from the drill.