I looked very closely at the timestream and maps of 101208_o11 and had a pretty hard time figuring out why the data were different, but it looked like the data really did differ on a point-by-point basis (according to pyflagger). The only conclusion I was able to draw is that the scaling must be off. I realized that the scaling was being done before delining. I moved scaling from readall_pc to premap, and it brought at least this one source into agreement. Time to run ds1-ds5 comparisons again! (this means that ds1 data MUST have deline run on it, but ds5 data doesn't really need it) Here are examples of ds1 and ds5 timestreams, with and without scaling, and ds1 with and without delining: