I wonder how many people would actually notice if the component diameter grew by less than a single millimeter ? Would it loose them any sales ?
Yes, and a huge difference in some situations, in others insignificant. For DIY pen kit components ? I doubt anyone buying them would see any difference when looked at in isolation.
No.
When PSI made their kits for the Rollester and Vertex who would have cared if the Vertex components were just .3mm larger so it could use the same bushes ?
With nonsense like this happening it's unlikely a major manufacturer will take the initiative to make it happen.