127mm f/9.4 OTA Construction - OTA Alignment (focuser aligned with holes)
 

A close-up of one of the holes in the main tube used for mounting the focuser... (Click for enlarged view)

 

The image above shows one of the drilled and tapped holes in the Meade 2.7" inch focuser lined up with it corresponding main tube hole. As you can see, the focuser mounting holes in the main tube are quite a bit larger in size as compared to the drilled and tapped hole on the focuser's flange. This was done because the mounting bolts (as seen in the previous slide) have a wide flat bottom seat so that they can be countersunk and make better contact.