Hey All2Real. Thanks for the support bro. With bundle hanging or bundled fulcrum hanging you don't have to worry about your penis being perminantly twisted when erect because when you do bundled hanging or any type of hanging, your penis should be completely flaccid.
The bundling of the penis while it's being stretched is just stretching different areas of the tunica with more direct force. The only thing that should result from this is increased length and girth upon erection.
For guys trying to correct a curve I think bundled stretching or hanging is a good way to fix it. For example. If your dick bends to the left when erect then all you have to do when bundle hanging is bundle your penis in the opposite direction to the right getting at least 1 full twisted rotation against the left side of your dick that curves when erect.
By bundling/twisting your flaccid penis the opposite way of the curve, you'll be stretching out the curved area to increase in raw tissue size. With time and consistancy your curve should straighten out upon erection, along with increased length and girth.