As I start the wings I've been looking for small tasks to do that are not to intensive, and then using them as breaks from larger tasks. One step I found was marking the rear spar doublers for trimming. I was a bit perplexed as how to do this repeatably and accurately. Until I figured it would work well on the work bench where everything could be held down. So I created a datum line then drew the other dimensions as marks. Finally I held the doubler in place and drew the lines. Simple enough...
