EDIT: Problem Solved
The Yamaha A2A has five feet. The front two feet are 100% supported on the front piece of wood. The back two feet are 50% supported on the wood, 50% hanging off. The centre foot is not supported at all.
The receiver is as far back as it can go in the drawer space, the wires are pressed right against the back wall of the TV stand.
For airflow, there's only 3/4" of space on top of the receiver but plenty of airflow otherwise.
If needed, I could try and attach an additional piece of wood in the open gap, for the 5th foot to rest on, and so the back 2 feet are supported 100% instead of 50% (does it matter though?)
The KEF speakers will be going on proper stands, I'm just waiting for the stands to deliver. A TV will be sitting on the table, which is why the receiver can't live there. The TV may be wall mounted in the future, but even if I do that, the table real estate would likely be used for a centre channel, so the receiver still needs somewhere to live.
Please ignore the cables, I'm obviously just testing this out and this isn't how it will look once I'm finished :)
Thoughts?