Problem Prusa i3 Dual Extruder Replikeo

i have this problem:

ConfigurationStore.cpp: In function 'void Config_ResetDefault()':
ConfigurationStore.cpp:447: error: 'DEFAULT_NOMINAL_FILAMENT_DIA' was not declared in this scope

------------------------
filament_size[0] = DEFAULT_NOMINAL_FILAMENT_DIA;
#if EXTRUDERS > 1
filament_size[1] = DEFAULT_NOMINAL_FILAMENT_DIA;
#if EXTRUDERS > 2
filament_size[2] = DEFAULT_NOMINAL_FILAMENT_DIA;


can you help me?

Type

#define DEFAULT_NOMINAL_FILAMENT_DIA 1.75

On top of Marlin.ino

And did this fix the problem?
It did not for me.
I found three defines at bottom of original configuration.h missing in Replikeo's configuration.h. I added them and encountered furrther errors.
I have been at this for a month. I had to buy another PC because of a harddrive crash. It looks like Replikeo does not maintain their code or they have child slaves boxing up suff to sell.
You buy DIY. You fix.

My advice at this point is to scrap the dual portion of the product, go with original Reprap modules, and carry on from there until, if ever, Replikeo gets 'IT' together,
Anybody with years of coding experience has seen this type of NFT[not fully tested] quagmire before. It isn't worth the headaches.

Slam me if I am incorrect. All comments welcome as well as reguidance and redirectional answers.

I personally started with a single extruder (non Replikeo) for the exact reason of not wanting too much to go wrong.