Me: As you can see in the 3D model this is the only position in which these parts fit. If you consider a different part here with a different anchor shape you may have greater ease of use and better fit-up. In addition we will have greater flexibility in our final positions so that a greater range of other components will fit up and look good.
Them: Okay do whatever you need to do, but move those pieces in opposite directions (so they coincide in space and time), and make it fit multiple different parts so I can swap on the fly and it needs to look great.
Me: If you do it that way your components will interfere with each other, and if you force it you will have spring back in the wrong position for some components. May I suggest an alternative component that will not adversely impact appearance or performance in anyway, and will allow for a better over all quality of casting and ease of use.
Them: Well, this component works just fine in other molds. We are using this one.
Me: Okay, but I need you to acknowledge that you may have the issues I talked about along with flashing,and less than aesthetically appealing component location, and spring back in the final castings and that I advised you of these possibilities. I need you to say you are okay with that.
Then: Here is a picture of somebody else's product showing what I want.
Me: If you look at your picture it has ever single issue I brought up.
Them: Well IF you can make it perfect I want you to make it with every criteria I gave you...
God has granted me a fair number of abilities. One of those is the capacity to learn new things which has served me well. For this I am very thankful. The capacity to violate the commonly accepted working laws of physics is not among those abilities.