This should be your first step. Download everything. Have a coffee. Read everything. Have donut. If you like it, buy me a donut. :-D

If you've read everything you'll see you have a few choices here and there. Different enclosures, optional stuff, you name it. If you've read carefully, you know now. And I know you know. And now you know that I know that you know! We're like Friends now.

You can also go ahead and print the 3D printed parts - for motivation. YMMV, on my printer (vintage Prusa) everything fits snugly, but it wouldn't be DIY if you didn't have to grind off a tiny bit here or there to make it perfect.

Now that you have all files, you also have the gerber files for the PCB. So you can have the circuit board made. Depending on where you order, you may get more than one board, so maybe time to gift an extra to someone special? Nothing says "I love you" more than gifting your SO a blank circuit board of a scantool! The perfect Valentine's gift. Well, at least for makers. But don't gift one to your girlfriend if you're on a break!

Order the electrical components. The BOM (Bill of Materials) file contains all the electronic components to be soldered to the circuit board (which you should already have by now). Some things are optional. You can save a little, but it's not actually worth it. Do you want backlighting of the navigation buttons? If so, which color? Do I want it powered by OBD2? Or only USB? Do I want a bigger or smaller battery? Or no battery at all (also possible!)? Single Wire CAN (GMLAN) or regular CAN? Or no CAN? Your choice.

Also take a look at the BOM in the "How to put everything together" file, they are mostly mechanical components, but also some stuff like the battery that are not soldered to the PCB! Also: be aware that you have to make a custom cable depending on which connector your car has. Or what you want to end up doing with the scantool - it can be used for a crapload of other things with the interfaces, screen and UI. Use the bootloader for loading a different app. Tetris, Pacman, the possibilities are endless!

This is the most fun part of it all! Solder everything to the board. Read the "Tips on soldering this scantool" file in the file section. Double check the soldering for bridges or bad joints. Once the board is complete, you may proceed to the final step...

Putting it all together - sounds simple. And it is. At least if you follow the instructions carefully. Again: there is readme file for that. And that's it! Time to load an App on the scantool and go play!