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Oh my God - i'm so good to you guys....lol Found the source files from Alvaro on his GitHub account - follow this link - https://github.com/AlvaroRey to get access to the source of the V4 design. There are STL files and all sorts about the V4 design.

They (http://www.makergal.es/) also have a drop box account with lots of info - https://www.dropbox.com/sh/kfm3tpjrjab7lk3/AAA0gucCSBmcssSFuiC6OenBa?dl=0. Don't forget to thank the authors for this!