Yesterday's ATM session was probably the most busy and productive session yet. Jeff and I tested the 12" mirror from his Orion scope. FigXP was used as the data reduction program for the knife edge readings we took. The mirror tested as being "diffraction limited". The views that I have seen through this telescope are very good and I believe that the great views are due to great collimation. Jeff is THE most conscientious collimator I have ever seen. This is a lesson to me to pay a little better attention to collimation. The views through a Newtonian will suffer if collimation is carelessly done. Josh worked on his bath interferometer and it is nearly completed. What a powerful tool that will be when finished. Charlie cut tiles for a dental stone/tile tool and once he completed that, he poured the stone for the tool. It came out very nice and will serve him well as he works his 13.1" mirror. One note, if you use pink dental stone on a hot day, it sets up quick! I couldn't clean the mixing bucket we used before it hardened. Luckily the tool was properly poured before it set up. Jay worked on his equatorial platform. When this platform is finished, it will be a great help to Jay when he sketches. Keep walking the barrel! Mat This message and any attachments are solely for the use of intended recipients. The information contained herein may include trade secrets, protected health or personal information, privileged or otherwise confidential information. Unauthorized review, forwarding, printing, copying, distributing, or using such information is strictly prohibited and may be unlawful. If you are not an intended recipient, you are hereby notified that you received this email in error, and that any review, dissemination, distribution or copying of this email and any attachment is strictly prohibited. If you have received this email in error, please contact the sender and delete the message and any attachment from your system. Thank you for your cooperation