I did a quick search of the forum and couldn’t find much guidance on top plates. Most of the kits I see available for flex liners include a flat plate, although terra cotta plates are available separately that attach with screws instead of (or maybe in addition to) sealant. Some even have built in rain caps. If I have 6” of exposed terra cotta above my chimney crown is it worth buying a specialized terra cotta plate like the ones below?