Since this was my first time building a chained app, I took this interactive lesson to help me through.
Here is the main app.
Here is the first chained app for Tire Ratio
Here is the final chained app that shows unique tire descriptions
P.S. Could not attach file
For some reason, summarising the values from the input at each step of the chain wasn't working on my local machine - so I had to output a few more files to get it working
Also a great bonus from this challenge is going to OPTIONS > EXPORT WORKFLOW to zip up any inputs, outputs, and related workflows as a yxzp. Thanks @AYXAcademy
I tried to make use of %temp% directory but found that I couldn't have a chained app reference the files created in the leading application. If anybody knows notation for how I could have accomplished this please let me know (:
The second app would return this error with this input: (directly in the drop-down tool)