Hi Michael,
I did try the scale and it would join more than without the scale, but never make a solid.

This is the model I refer to. It is not something I need to fix. It is being used for a question regarding machining....But it just seemed to be the same thing so thats why I mentioned it. If you want to peek and refer to it to see if anything stands out, that would be nice. But there is no need to "work it" to try and make a solid. Only to see if you can see why it is not.

Thanks