For the 2x5 SMD pads on the Teeny4.0, was it designed for a specific header and if so, whos (molex, samtec)? Most parts i have reviewed have the pins you solder exceeding the lengths of the pads (2.794mm). Thanks
Though note, the Teensy 3.1/3.2 had 7 x 2 pins, while the Teensy 4.0 has 5 x 2 pins. You would have to remove 2x2 pins from SMT header before using it with the Teensy 4.0.