However, a new 3D printing project started last year by Johann may add some new blood to the gene pool. Johann developed the Rostock printer.
Where the 'classical' RepRaps are all cartesian 3D printing robots (x, y & z axis), Johann went for the Delta-type 3D printing robot.
All this makes me question which path to follow; hence the title "To Mendel or to Rostock? That's the question". Let me work a bit on this one; I'll be back (soon?).