Welcome to my guide!
The very first thing you should do is read the MIDIbox Quad Genesis section on the wiki as much as you can:
http://wiki.midibox.org/doku.php?id=midibox_quad_genesis
Especially the MBHP_GENESIS, MBHP_Genesis_LS and MBHP_FP pages.
If you would like to build the wooden case before soldering the electronics then please jump to this post:
Step 1:Installing the MIOS32 Bootloader on STM32F407G-DISC1
This is already explained in the STM32F4 Based
Bonus Step A: Building the Wooden Case
First of all I would like to say a big thanks to Technobreath for designing a wooden case for MIDIbox Quad Genesis.
This case is designed to be easily reproduced by the community without much skills or tools needed.
You can download Technobreath's build instructions here which has all the dimensions you need to cut out each side of the case: building-instructions4-ilovepdf-compressed.pdf
If you have better skills or tools at hand, feel fre