Opening on the wall - interference with plaster

[Zendrix]

Hi!

I have an opening on a wall, as in the picture.

Im getting a confictuous drawing on the plaster that connects with this opening and i cant seem to get rid of it.

Any ideas?

Thanks,

Z

[Steve Jepson]

I am not exactly sure about the question, however, you might be better off not to use an opening.  Make it using SEO with an slab or something you can use to extract downward on the wall/target.  ?