Hey,
Sorry I’m not at a PC, but I’ll try and help, you’re doing great.
Just get a List Create node in there and feed your Door, Mark and GUID and your 3 lists will be 3 columns to feed into a create Excel node (you might need a list transpose), have a look at this post maybe?
You’ll also want a list of column headers in there, make a list of strings… In a code block put [“Family”,”Mark”,”GUID”];
If you want to control the graphics of the Excel, get the Bumblebee Package and google to get the Primer.
There’s a node something like Parameter Exists which might stop the node throwing a warning.
Hope that helps,
Mark