Not his issue, his issue is changing the bed level during the print so he can fit his hand in there and put the Nut in - the problem is s3D messes up returning the bed to the original position - pausing print and moving the head away to stop melting the print is one thing, moving the bed down and then back up again after the pause is the difficult part.
OK, then the end g-code of the first profile needs to move the bed down by a relative distance, and the start g-code of the second profile needs to move it back up again?

But if the part is not too large, then simply moving the head to the side would also work? That way the bed stays in place as re-positioning the bed will give a visible layer artefact in the print.