It's a long time since I touched an Arduino (now in my 70th year and rusty!) and I'm out of touch with the practicalities - and my questions are rather basic. Any help will be appreciated. I hope to stack Adafruit Music Maker MP3 shield onto an Arduino Mega or Uno. But the pinouts of Mega and Uno look so different and this difference seems to apply to position of the 3x2 header for the serial connection. Is it equally easy to stack this MP3 shield on both Arduinos ? If I also want to connect to some of the Mega's GPIO do I have to solder in stacking headers with longer pins that protrude through the Music Maker's PCB ?
Thank You for considering my question, Steve