Just made some measurements on the F133 2008 and F111 2011.
F133 height diff. mast track to top of board between front footstraps = 0cm height diff.
F111 = 3 cm height diff - so apparently I need to set my boom 3cm higher.
SB say about 2 cm on their webpage – so I guess you need 2-3 cm higher – if possible.
It looks like wind this weekend, so IŽll give a go. Rig the sail with too long extension (1-2cm) as Roger suggests and then really move the boom up to the absolute maximum height.