If you have counter weight 180 degrees of each other then neither one serves any purpose except to add weight and cancel each other out. Your building a boxer engine from what I deduce. If that's the case then the opposing reciprocating mass cancels each other out. Get rid of all the counter weight and put a straigt bar in the center as earlier pictured.
No offense intended but I think you have a little home work to do.
As I said, no offense intended. Nothing wrong with trying. But on the other hand this is a good place to get that kind of info!!!
Besides, trying is half the fun for people who like doing these kind of things. Don't give up and keep at it.
We all started at the beging at one time.
But then I could be wrong. I have read several times in the past things on this site that were wrong. 30 years as a mechanic taught me a few things.