Pieces and parts management with Woodstone's fenestration database is critical for the success of our finish milling department. One 8 lite over 8 lite weight & pulley double hung window with insulating glass includes nearly 800 pieces and parts. And with each piece and part able to be dimensionally customized in increments of 1/32", one seemingly minor dimension change from the architect can have a profound impact on the entire cut list, from the bars and muntins to the insulating glass spacer, pulley size and the length of sash chain - not to mention the Rough Opening the contractor prepares to accept the finished unit