RepRapGuru Prusa I3 v2

I recently purchased a RepRapGuru Prusa I3 v2 kit from Amazon and spent some time over the weekend putting it together. The built had a few hitches, but nothing that I wasn't able to resolve fairly easily.

My question is this: RepRapGuru has the firmware on their website for the printer, which I downloaded and put on the Arduino Mega. It seems to work to an extent, but I don't think it is the latest version of Marlin. So, I was going to try to upgrade it. So I grabbed the latest version from the github repo, and began poking around in the Configuration.h to ensure that the proper things were enabled...thats when I realized that there are SOO many things in there that I am not sure which ones I need, which I shouldn't enable, etc.

The printer itself uses a standard Arduino Mega, along with a standard RAMPS v.1.4 board (which I have replaced with a 'less crappy' variant), along with 5 DRV8825 stepper drivers (swapped out the A4988 drivers it came with for the DRV8825) and a knockoff version of the RepRapDiscount Smart Controller.

Is there any documentation/tutorials out there that can assist me with getting the configuration for the printer done correctly? I know that simply downloading it from github and compiling it isn't going to suffice, heh. I was thinking of running a diff against the 2 code paths (the RepRapGuru code and the vanilla code from GitHub) to see what the differences were, specifically in the Configuration.h file, but I can only assume there is a better way.

My other printer is a MakerBot Replicator 2X, which is more user friendly to obtain a proper configuration with. This is my first RAMPS based 3d Printer, so I am in uncharted territory with this configuration.

Anyone have any thoughts or ideas that may point me in the right direction?

I now find myself in the same situation, needing the specific tailoring of the configuration.h file for the RepRapGuru printer. Did you ever find that information?

That is one instance where you have to go line by line and do everything as correctly as possible. It helps to learn some C/C++. But more importantly, just stick with it till you reach the end of Configuration.h and Configuration_adv.h, following the instructions in the comments. Once you do it a few times you will learn where the settings are and modifying things to your liking will be much easier. The best documentation comes within those files in the comments. Have a tape measure at hand too for the bed and Z dimensions. And don't be intimidated, its just a pair of files. For a starting point, copy from the Marlin root directory "Marlin/example_configurations/FolgerTech/i3-2020/Configuration" to your "Marlin" directory then edit your configuration files afterwards. That should be a similar enough machine. Your X end-stop may have to go to the other side. I hope this gets you started on learning Marlin configuration.