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This one: https://www.manfrotto.com/global/super-professional-tripod-mk2-161mk2b/

Berlebach Castor II carrying ST120 and 102/F7 triplet refractors. Castor II advertized capacity is 20kg in total dual mounted. Two refractors with all accessories are 12kg in total. Castor II actual capacity might be lower, as this rig is reaching its limits, but stable enough to be usable, maybe also due to Manfrotto heaviest duty tripod. I use binoviewers on the triplet for high magnification planetary observations (say between x150-200 power), and is still stable enough, and shakes dump very quickly. For low power wide field views through ST120, stability and shakes are not really issues. I thought of replacing the Castor II with a heavy-duty Giro Ercole (with 18kg capacity on one side), but Castor II is usable enough preventing me from pulling the trigger on Giro Ercole, at least for now.