Ejectors and rib extensions.

[B. Dudley]

Parker guns were sometimes special ordered without rib extensions. This seemz to be, more often than not, seen on competitive target guns.
The other day another thread about early Trojans was discussing rib extensions and their functions. After some comments about the extensions not serving any real function, Dean mentioned about the extension serving as a guide and stop for the shell kickers on ejector guns.

That got me thinking... has anyone ever observed an example of the above said special ordered gun with no extension that was also fitted with ejectors?
I would be curious to see what the factory did to make this combination work. If they ever did it.