Interior Elevations Question

[Anonymous]

Lately I've been assigned a lot of interior design work, and only now discovered the "Interior Elevation" tool, which seems to be very useful if not for one issue I can't seem to be able to solve.

This project requires a lot of detailed modelling and I've set several pen styles to 0mm thickness. However, I can't find a way to change the thickness of the Interior Elevation limit line.

To me it looks to be at least 1cm thick and I cant place all those cornices and panels accurately to the wall because of it.

Screenshots are to follow.
Any help would be appreciated.

[Anonymous]

Not sure how to post TWO attached images, so here goes the second one.