[Therion] Changing outline on pitches breaks lox

hello Just been changing the outline on a pitch so the bolders below look right on the pdf, by setting the bit of wall to outline none, clip off and the pitch boundary to outline out clip off, see p_before and p_after, the problem is that then the lox model also has a hole in it see l_before and l_after. I suspect this is bug/feature that is hard to get around? Andrew