Here is a bit of a close up. I found this much easier to use a 90 degree tool to bolt that in then a screw driver.
I have 1 leg ready so I turned the droid a bit and bolted that leg on. Next up is putting together one of the outer foots. There is a certain order for this to be done that makes it easier so read along.
2. Then you install the hoses in the foot and don't forget the foot strip, its easier to do this now and about impossible after the foot drive is installed.
Other misc problems doing your install.
Not everything is easy peasy what I find is my foot drive is about 1/8 of an inch off the center channel as the red arrow in the image above shows. The green dots I paint in the U channel are where I should have drilled the holes. So 1 side of the NPC needed more grinding than the other side needed. Make sure the foot drive is centered perfectly in the U channel of your foot shells or there will be hell to pay!
Last tip: Don't put any clear coat of paint on any of your parts as they might get messed up in assembly and you never known when final assembly is until its sat for months completed. I plan to air brush the parts later to fix them. This black Death Star Droid should have NO weathering, not until the Death Star blows up, until then it was shiny and clean looking.
Also don't use loctite (yet) because as a droid builder you never know how many times you have to take these various areas apart until you have parts just where and the color you want them. I'll probably be taking these feet apart several more times to adjust the feet level if needed and other things that will pop up. I know how R2 builders think, install something use loctite and think " This part is done, I can cross that off the bucket list". No part is ever done, you're just done with it for now...