These are modified/hacked parts for the RepWaker Mutant Ra04 by Dampfboot as part of the Shellmo Open Source Project. http://www.thingiverse.com/thing:326191 The shoulder and hip were modified for strength and add the rack for the battery holder. (When I was adding the eyes the shoulder started to twist a bit so I made it a little wider on one side). The battery holder is modified to remove the screw tabs that were too large to fit on the RepWalker. This was a part by flummer: http://www.thingiverse.com/thing:331394 Two parts were modified on the RepWalker add on Eyes RA01 by Dampfboot http://www.thingiverse.com/thing:328939 The first is the eye socket which I modified to allow for a nut to be used. This was more of a hack that I needed personally because I had already reamed my eyes before I realized that you were supposed to thread them. The second is the left support. The Turnigy TG9z micro server I used for this was slightly longer than Dampfboot's design allowed for. I increased the clearances to accommodate the servo.Follow directions in source things. These are advanced parts. You probably will want to determine you need these after you build the source things... Everything was printed at .25mm PLA on a makerbot replicator 2.