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[modeller_usage] iterative_structural_align question

I noticed that 9v7 has a new command that is designed to obtain the best set of parameters (gap_penalties_1d and gap_penalties_3d) for aligning two or more structures. Since the reference (Madhusudhan et al 2009) is not yet available, I had a few questions based on trying the command.

(1) Based on the output log, the first parameter of gap_penalties_1d is varied from -150 to 0, and the second is varied from -50 to 0. The default values for gap_penalties_1d in for alignment.salign() are (-900, -50). What is the logic for the choice of ranges for gap_penalties_1d values in iterative_structural_align()? I always assumed that the default values of the various parameters in alignment.salign() represent a good starting point for these values.

(2) I assume that the value "final max quality" equivalent to "QUALITY_SCORE(percentage)" in the standard output of alignment.salign(). Is this correct?

(2) In the Advanced Tutorial the example script "multiple_template/ salign.py" runs salign multiple times to first get a rough alignment and then refines it by incorporating more information through changes in feature_weights. Is feature_weights fixed at (1, 0, 0, 0, 0, 0) in iterative_structural_align()? If so, is there any way to use iterative_structural_align() in a manner similar to that shown in the tutorial?