Really impressive, Yeti, that PE sure makes a huge difference.
Anyway, here's a picture of the repaired part of the railing...
As you may notice, the bulged area at the corner is still missing, but as this is only about a third of a millimeter, I was thinking of solving this by applying some masking tape and put a couple of extra layers of paint on the corner part.
Oh, one more thing, although no photographic evidence exists that one of the S-7 type boats actually was equiped with the depthcharge dispensers as supplied with the Airfix kit, I have decided to mount them because of the "busier" looks of the rear deck.