Line-Of-Sight - Possible to set 'Cutsom' or 'Solid' obstacle properties in events?

Is there a way to set the custom or solid properties for line of sight using events?

At the moment I can only set it using an instance in the layout. If I don't want to have an instance active in the layout at startup I can't access this property, and the workaround is to destroy the initial instance at startup. This appears necessary because the property seems to default to solids.

It's common practice to have the instance on the layout at the start and destroy it

Thanks for confirming :) Perhaps will be added in future.