[Pharo-users] Spec border widths of 0 are showing as lines?

Hi all, I have set the border widths of SpBoxLayout to 0, but there are still lines showing between the various components. Please see attached. As a work around, I thought to set the color of the border to the background color of each panel, but SpBoxLayout doesn't have a borderColor: method. How do I get borders to not show so that adjacent panels blend? And how do I set the color of borders? I am using SpRoassalPresenters and have tried setting the borderColor against them to no effect. Thanks, Stewart