Cally asked if my apron rod would pass through after the latest changes. The answer is no. I need to use a narrower rod as there is only about 60cm in between. The ondulé reed itself is 60cm wide.
So, here another photo to show this:
The green arrow shows what the maximum width is in between. I did not take a photo of the narrower apron rod itself. It's now wound onto the beam with the woven cloth.