Jaegers 6" f/10 "GJD" OTA Construction - Main Tube Prep (filing drilled holes for lens cell - 2)
 

Filing final sized holes drilled in Main Tube to receive Lens Cell - 4 (Click to see an enlarged image.)

 
In this photo, I put the finishing touches to the three (3) holes in the main tube to receive the lens cell by performing the second step of removing the burrs from inside the holes with the round face of the small file.