No Aris... you did not over do it here...
I'm glad you make us think about physics and engine design!
Here is some information as to why the inline 6 is such a good design regarding balance.
"As I understand it, in simplified but essentially correct terms, due to the mass of the piston moving up and down in the cylinder, the engine block wants to shake up and down (i.e. along the cylinder bore axis); this is the primary or first order force shaking the engine. Due to the mass of the connecting rod swinging from side to side, the engine block wants to shake from side to side; this is the secondary shaking force.
From what I know at this point, it is these two forces which cancel out in a spinning - BUT NOT FIRING - inline-six, flat six, or V-12. By "cancel" we mean that the interrelated motion of the various pistons and connecting rods act in such a way that no net force acts on the engine block to shake it. As one piston moves down, another moves up; as one piston rod swings left, another swings right. Net result: no shaking force in either the axial direction (along cylinder bore) or at right angles to this."
Link source: http://www.zhome.com/ZCMnL/tech/harmonics.htm
Here is a picture of a inline 6 crankshaft...
And here is a front view of the same crankshaft...
From what I gather, if you look at 2 & 5 the rods big end would be coming towards you, while 3 & 4 the rods big end are moving away from you.