Thanks for the response.
You have an incredible setup! I currently have the Eclipse so that will act as my centre speaker (pales in comparison to the Theatre but hopefully one day I will upagrade).
So I have engineered wooden oak flooring so that maybe an issue it seems? Surely if you wall mount the 28s, the subwoofer will be firing against the walls? Well, I think I have breeze blocks and plasterboards so isn’t as hard as concrete?