How to stop a mesh from passing past the mirror point and merge with the part added by the mirror I am using a mirror to merge the mesh with its mirror created counterpart but it simply passes through the mirror and overlaps with it instead. Is there a way to automatically merge them in the centre like shown in the 2nd image or is the only way to apply the mirror and manually find the centre, cut it vertically and remove the excess

Here is an image of the mesh after applying the mirror modifier:



Here is an image of the manually merged mesh:
If you apply the mirror modifier as seen in the picture below, it will clip the mesh and auto merge it 





It's specifically about these 2 values.