Good luck with the IDO on a board as fragile as the F-158.
Same with using it as a beginner board.
An early GO (83 cm wide) or and '01 or '02 Start would be so much better,
has the center fin option and a full EVA Deck.
P.S. What happens if the IDO holds the rig up and the board sails away faster than your GF or the little guy