So the first PDCs I designed were awful. A quad of ICBMs and some PD and that's about it. I've explored about 5 jumps in any direction and have yet to run into aliens, hostile or not, besides what I presume to be Precursors (and whom I have finally evicted from a desirable system.) I am very much strapped for duranium and gallicite and getting rid of those PDCs might be a nice windfall to jumpstart my construction of automated mines bulk up my mineral imports. The only problem is that I can't find a way to actually scrap them.