Hope this would help:
With the informations in my tutorial you can compare each corner with the corner of your model, i am working on a corner module script, wait a bit and i can send you the script i made (it work). Thanks for waiting @aIphabox. So, just make a script that check the position, and if it was false then use coroutines or spawn functions for create a loop and always check until if it was in the Region. Its just a idea, but hope it will help you.