Hi, I was Surpac user, sometimes in ~10 years back. Is there a way to create a proper pit solid from 2 surfaces (below topo and above pit shell) and have a valid solid? This solid will then be used to calculate reserve by intersecting to block model. Current practise is Surpac produced invalid solid (difficult to repair), therefore created block model constraint from those 2 surfaces and updating block model field with partial percentage calculation, to where block model entity sits below or above those 2 surfaces. Keen to understand how the current user solve this issue. Thanks