Ty - I used this jig-making technique on earlier projects, and it works well for creating a single jig for mirror-image parts. I don't glue-in the dowels so that I can push them out to re-use on future jigs. Regarding the scraps - yes, it is kind of nostalgic to use offcuts from other projects, assuming that I'm able to remember where they came from. 😄
"The good chair is a task one is never completely done with" Hans Wegner