ADM DUP plate is 21" wide and 3/4" thick to prevent flexure. ADM saddles for Losmandy. Dew heaters required especially during autumn and spring. Load on the G11 is about 55 lbs. The mount handles it with no issues for astrophotography. Auto guider numbers are the same for this load or minus the Tec and an SMC 200 lens with Pentax 67 - about 25 lbs.