[1.8-1.10] Extraplanetary Launchpads v6.8.2

I've been there. It gets annoying, actually, when you have to do the roundabout work of going to the VAB, remembering the parts you want, building the dummy craft, and returning to the site to build it. OSE builds the part and stuffs it into the factory's own KIS space. Also, if you wanted to produce a KIS box full of little things, OSE saves you from having to remember (days later) what you stuffed into the KIS box on the last dummy craft. Instead of that, you build a new KIS box and stuff parts into it from the factory's inventory all without having to go to the VAB. The matter isn't always about what parts you missed when you build a big ship or base section with many parts, but is also about when you're building a small craft or expanding a large one, piece by piece or section by section with plenty KAS involvement. For that kind of thing, switching scenes for every few steps can be too much. That's what OSE's advantage really looks like.