rooting the top

I am thinking about trying this, has anyone ever done it?

I have a plant that is was about 24" tall before I started LSTing it. It is now bent over so the top growing tip is almost touching the ground. I am wondering is I can cut the top growing tip, apply a rooting hormone and root in an a separate pot, so I have two root systems feeding one plant. This will also expose a large canopy to the light.

I know getting the top to grow roots is difficult because of the auxins. I don't expect this to do anything special other than be a freak.

Thoughts?

You are talking about scraping and pinning the top, not removing it from the plant?
I'd only recommend that as a propagation technique. And it is more appropriate to something like a strawberry or philodendron that is already 'designed' to root without hormone or scraping at any node- the act of scraping and pinning to soil can potentially introduce disease, and if you are interested in air-layering, which is a closely related technique, I'd say use either a sterile, inert medium for the rooting, or a rapid-rooter which is not technically sterile, but has only beneficial bacteria in it.