The contained file replaces Modules\AddonMods\tukui.lua (just to be clear: you need to delete the old file, and rename the new one to tukui.lua and put that where the old one was). It puts Bar3 and Bar4 above CoolLine and enables Mouseover. It was made for SanUI-5.4.1.1 and might not work with a different version (there's no harm to backup the old tukui.lua and trying, though).
Requested and tested by Riggins.