Mk III Didn't think it was worth sending to space, sojust one pic. Mk IV This is where it gets interesting In order to overcomplicate stuff, and add some nuclear engines (that was the moment I understood what ISP is). And with the last stage came the fail. As a empty fuel tank was flying away, it took with it one of the engines. Mk V Actually I accidentally deleted that one so, lets move on. Mk VI As things get even more complicated for no apparent reason. Mk VII Complicate some more. At this point the space craft was way to heavy for the old propulsion, so I created Mk VIII to solve the problem Mk VIII With great power comes great failure. Actually I wasn't able to get it anywhere, because 2 seconds after getting the screenshot i fell apart. Mk IX Here is the moment I figured out that I need to rethink my design, because however great looking it was, it wasn't practical Tomorrow I will probably upload part 3, that will include all the newest designs, that in my opinion are very well planned