A few years ago I need to make a large number of windows for a project. I needed to make them, since none of the commercial windows available were the proper size for my project. Even if they were available, 21 windows would have been expensive to acquire. Anytime I need to make the same part many times, I prefer to make and use a jig. As I discussed my dilemma on a site, another member, Ron Hill, showed me a picture of a jig that someone else had made. The jig would assemble the window sashes, but then I would still have to assemble the sashes into a window. I decided that I didn’t want a jig that was going to only do part of the job. So I designed a jig that would build the whole window at one time.
So now, when I need a set of windows, I throw together a jig to make them. Its quick and easy, and I can make as many windows as I need. I save my jigs in a bin, so if another project comes up that needs the same size winodw as one I have already made, I dont have to build a new jig.