A 13.1" F4.42 for Carey S. in Riverside, California. Here, the OTA is tested for "strut" length. I make sure all my eyepieces come to focus. Additionally, Carey has given me a couple of his eyepieces to test as well.

The "test struts" are adjustable in the event minor changes in length are needed.

Once the OTA is complete, the rest of the telescope comes together in about a week.