The two horizontal tracks crossing the right teeth of the older comb were soon seen to be produced when that signal was interrupted. Having revealed something so unexpected, the pattern jumped the queue for running on towards 150,000 iterations, but it almost defies thinking about the subsequent discovery of the same structure repeated, only rotated 90°. Second time around the puffer trails ran across the locally dominant ship stream from the original Delta, initially in its chaotic zone but soon moving into a repeating zone. So that signal was interrupted more frequently. with the tenth cross track in evidence before reaching 150,000, but as yet no clear repeating structure so it is already running on towards 200,000 which will hopefully get done while I'm down the coast.