Laser Collimator

I used the "Laser Collimator for Telesope by Gyrobot" thing 101030 as a starting point and adapted the concept to use a laser boresighter that I inherited from my father. See the link below for a model that looks like the one I have. If I did not have the laser boresighter I would have chosen a cheap laser pointer in the $5 range or a cheaper boresighter in the $15 range. Perhaps I would have simply purchased a laser collimator for $20 rather than spend $15.

I adapted this design for my printer by reducing the OD of the 1.25" tube by .013" based on a test print of a hollow 1.25" cylinder. It was out of round and the worst oversize dimension was 1.258". My eyepieces seem to be .005" undersized, so I reduced by .013" to 1.237".

The laser hole was too closed after the print and I had to drill it out with a .125" bit. I would open it up more if I were to modify the design. The hole was a little hard to reach with a drill bit, so I had to grasp the bit with only a short section