Ok so all the Pneumatics resources we've found so far say that we must connect the pressure switch to Digital port #18. We have not figured out what digital #18 is. There are only 14 digital IO ports on our sidecar (the one we got in the KOP). We've been helpd up for almost a week with this problem, and I'm literally ready to rip my hair out

. If someone could post a picture clearly indicating Digital 18, explain WHERE digital 18 is, and/or explain exactly WHY we need to plug that into Digital 18,
I would love you forever

.