Gap appears when trimming two vaults

[Anonymous]

Hello!

Does anyone know how to trim the vault going from left to right, completely to the vault going back to front?
Since the vault going back to front is not a half circle, but more of a circle cut somewhere on its bottom, when I use the command 'Trim Elements to Roof/Shell', the bottom part of the vault going from left to right is cut a bit too much, there is a gap between two vaults (as on the attached image).
Is there any other command to achieve the good result or should I do something differently with this command 'Trim Elements to Roof/Shell'?

Thank you!

[Hmooslechner]

Maybe so:

https://www.youtube.com/watch?v=4CU9M2sMjyc

[Laszlo Nagy · Accepted solution]

Just to explain a bit why this works the way it does:
If you activate the View > On-screen View Options menu command, you will see the trimming body of those Shells. You will then see that the trimming body is an infinite downward extrusion body from the shape of the Shell. This is why this connection is generated this way.

What you can do is select the Shell, go to its settings Dialog, and in the "Floor Plan and Section" panel, change the value of the "trimming Body" field from the default "Downward Extrusion" value to "Editable", and then you will be able to achieve the desired effect, or you can edit the profile of the Shell to achieve it.

[Anonymous]

Thank you for your help!
I managed to do it both ways, but I think Laszlo's is easier to do here.