Thank you David and Louis, as with many builds the interior is usually followed by a spurt of growth! I still have the gun bays to consider. Hurricane bay definitely open. Spitfire - probably.
The Aluminium was simply at the request of the instructions - I agree, whether entirely accurate or not it looks good! Photos of Malan also show a spit with no headrest, so I have omitted that too.
Finally, yes I can confirm the rumours, two very excited little boys buckling under the weight of a big box gave me a great present on Father's Day (my wife genuinely understands me, I guess).