I'm not sure what you have. Which SWISCO product code were you comparing your hardware to, exactly? That will help give us a better idea of what you're looking to do. The hole spacing is also only part of it; another important thing to consider is the link arm. I cannot tell what yours is based on this picture. Is there any way we can see the operator removed from the window so we can have a good look at that link arm? Can you also give me its size?