Broom 34 dinnette

[Portland Billy]

The dinnette on my broom 34;converts to form a double, but I can't figure out if the saloon settee will convert to allow another.
If not is it possible to redesign this to work.
Does anyone know how this may work, or if not is it possible to reconfigure to allow this ?

 

[Portland Billy]

It's a broom 34;Sedan.
Boatone would know he had one just like mine.

 

[Whopper]

I suspect the length is the limiting factor. Have a lie down on the settee and see if it’s long enough.