Filling this gap

[18bravo]

Seems to be a popular method:

Advice on filling annoying seam

Another thing I like to do is lay in a piece of stretched sprue, again from the same kit. You can even shape it before hand a bit if it needs rto be angular on the bottom for instance. lay it in the fgap, and THEN apply cement. Keep squashing. Often this is enough and doesn’t need sprue goo afterward- just final shaping.