Questions for Xin about WCP DynamicPointCloud: when/how is the PC dynamically extended? WCPointCloud: index_{u,v,w} are indices of the wires nearest in pitch to the sampled point? SlimMergeGeomCell: What are uq and udq (and etc for v and w)? Projected blob charge value and uncertainty or measure value and uncertainty? SlimMergeGeomCell: What is q and dq? Solved blob charge value and uncertainty? Hough: the Hough histogram does not use equal solid angle. Shouldn't it be cos(theta) vs phi? WCP::PR3DCluster: how does a SlimMergeGeomCell get into multiple time slices (why have cell_times_set_map)? WCP::PR3DCluster: why inner loop does not seem to use outer it?