Awesome upcycling Don and vision to do it. Good job you located the old dowels or it might have been a different story. LOL. I've been trying to hang a radiator today in one of the new rooms in our new extension when the floor screed hasn't bee done yet. Having to bounce lasers all over the place to see where the floor level will end up. Even now I'm not sure it's right. I guess I'll find out later. LOL.
Andy -- Old Chinese proverb say: If you think something can't be done, don't interrupt man who is doing it.