To anyone who want to buy a brand new C11 OTA to put it in a former Ultima fork mount : THAT'S DOESN'T FIT ANYMORE. Celestron doesn't still have the the 2 big screws needed to fix the OTA on the older fork mount. Only the 2 screws for the new Nexstar brackets are available. I've just received my brand new C11 OTA and facing the situation.
Fred
Fred