How to align part to be on top of another, while keeping the parts rotation?

[mahele123 (Dummy)]

I’ve tried using UpVector and some CFrame logic but I can’t seem to get it right. Here’s some example images of what I mean.
Before:

After:

[dthecoolest]

Have you tried this

How to get the angles of a surface?

Rather than trying to convert this up vector into an angle which is also complicated it’s better to leave it I would rather use @EgoMoose advanced CFrame technique to leave it in terms of vectors. We can obtain a CFrame rotation to align the current persons “UpVector” to the new surface upvector. Here is an example script and video. The advantage of this method is that it will allow you to rotate along the new upVector without having to specify a right vector as a CFrame.fromMatrix solution. …

[mahele123 (Dummy)]

Thank you so much! I was scratching my head for days trying to find a solution.