What is the best way to create a Wall Slide in C2/C3?

Hi guys!

I already have a functional Wall Slide routine in my platform game (in development), but the problem with it is that it does this action on everything (platforms included) and I would like it to do ONLY on walls.

Below is my current routine for you to see and give suggestions:

PS: Please ignore the "Overflow" variable. It's just a game mechanic. :)

Thanks again for everything! :)