It took a long time to ship to US. So I advise to not cheap out of the shipping like I did. I would rate this project Medium to Hard. Due to the unique soldering angles. I was able to learn a lot about soldering and of course ESP32 wifi Dev boards and Marauder firmware. I used the FZ_Marauder_Flasher flawlessly. I plan to see if esp flasher will also work for dual boot.