Fretting Over the Handlebar Layout

I managed to over-think just about everything on this bike long before buying anything.  This may seem over the top, but I'm glad I did, heeding to warnings by many a forum poster that its wayyyy easy to buy parts that don't fit, no matter how much they look like they should. Those posters were 100% right.   It seems every single component comes in numerous configurations, sizes and materials, and each has morphed over time as standards changed in the bike industry.  Just Google bottom brackets and see the many, many, many different types and sizes.  Its easy to get the wrong part and it would have happened more than it did if I hadn't over-thought things.

Below is me over-thinking the handlebar layout.  This picture came after deciding from the many handlebar types available and settling on the length, shape, material and stem clamp diameter.  The picture changed over time as different components got selected and deselected but was finalized prior to ordering anything.

                                                                                                                                

     Handlebar

     Grips - Ergon grips (Right grip is 3 cm shorter by design)

     Computer remote button

     Brake levers

     Headlight remote button (B & M Luxos U)

     Rohloff twist shifter clamp

     Rohloff twist shifter 3 cm grip section

     Stem clamp