AV400 B777X

That's exciting! Looking forward to it, wonder how it will compare to the JC one. Folding wingtips would be epic, but understand there are limitations at this scale.
If moveable is not possible then perhaps they could look into replaceable a la Interactive series style
I agree. If moveable were possible, it would probably leave a large bump that would detract from the model. Replaceable would be ideal in my opinion. They could use magnets or perhaps a pin to secure the winglets in place.
Saw it from My Hobby House's page on Facebook this morning! Really excited and looking forward to how it looks!