If you feel you have a solution that can help, feel free to answer.
Never worry about spoiling someone’s sale (including me).
Example
Today, I posted about a new set of starer kits.
I then noticed this post: https://forums.coronalabs.com/topic/73259-highlight-letters-on-touch/
I didn’t have the time or inclination (today) to post a free solution as I often do (between 400 and 500 full code answers in AskEd subfolder). But, I did think it worth the time to cross-link to my announcement post.
Having said all that, if you were to have an answer for the OP and wanted to share it, please do. I’m totally cool with that.