This is a revival of an old mod by @Munar Industries, original thread is here: http://forum.kerbalspaceprogram.com/index.php?/topic/99029-104-munar-industries-modular-fuel-tank-expansion-beta/&page=1 The parts are beautiful, but the volumes and masses needed some work.  With the extremely capable assistance of @CarnageINC, who did an awful lot of the heavy lifting (ie:  he did most of the calculations of the volume, etc of the parts), I am happy to present you with the results of our wo