Getting started with Teensy 4.0

[Lolwel21]

I'm in the process of designing a TeensySaber that uses a Teensy 4.0 as its microprocessor. I primarily chose the Teensy4 because it is significantly faster than the Teensy 3.2 for the same price, and offers the ability to use a direct connection to a micro SD socket.

I have a wiring diagram that I want to get some feedback on, and I also want to make sure if there are any changes I have to make while flashing/configuring ProffieOS for this hardware, including an I2C IMU and an I2S DAC (due to the lack of onboard DAC).