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I'm not sure even judicious trimming would make figures from this end of the 17thC do for figures from the 30YW and ECW.
The main problem is that coats at the time of WSS were fundamentally different - bigger cuffs (much bigger cuffs) and the overall length of the coat itself. Much longer than the earlier coats.
Of course if anyone wants to do this, hey they're your figures, but I would rather this sculptor turn their skills and talents to a dedicated 30YWM/ECW range and turn out what I feel would be the definitive range in 1/72