Hs123 Wing fillet shapes

I am trying to identify any consistency between the shape of the fillets where the trailing edge of the wing is attached to the fuselage. There seem to be several shapes but no consistency to variant that I can easily see. There also are some (what I can assume) are in field modifications such as the removal of the stirrup or possibly patches. One possibility could be location or date of manufacture.

Ultimately I’m a bit flummoxed by the whole thing so am open to suggestions.