Started on both spars together; ideally I’d build both entire wings simultaneously, but my limited workshop space just won’t allow it. However, where I can I plan to knock out steps that apply to both, like fabricating a spacer, etc. For the spars I have enough space to do both so I will. Clecoed and match drilled the splice plates to the spars. Not sure why they didn’t just make the spars 6 inches longer as this seems to be more of a “make work” step than anything.