As the title says, i’m just wondering if you can change the size of one side of a union/part without changing its original position. How would you do this? Thanks. 
EDIT: Also, does using :ReSize() fix this or is there a way to use math so that the part stays in its old position completely?
Could you elaborate?
I did not quite understand what you meant by this?
When you change the size using a script for example the object still have the same CFrame?
So what exactly is the problem?
No, i’m asking if there is a way to change the size of a union only on one side (left or right) without changing its position, even very slightly, just so that the union doesn’t move at all but one side does.
If you’re using a script you should simply be able to change the size then move the union half of the size change in that direction
Example:
If you want 1 stud on the right then add 1 stud to that axis and move 0.5 studs to the right
This will make it stay in the same position but be bigger in one direction