Wanted to fit in my normal (75cmx44cm) suitcase. All this (including harness and bar plus a 12m SOUL comes to 16Kg leaving enough weight and space for clothes. I used a carbon wrapped balsa stiffener that mounts to the board and allows a foil to be mounted onto it. To do this I sank some stainless T nuts into the board. The foil was a cut down (to 75cm) old Zeeko that I re-tapped and re-sprayed. It also has foiling straps as an option. Easy to use as a TT (15-25 knots) when fitted with pads and fins or Foil board (9-18knots) with the 12m SOUL which packs small and light. First few trials have been great with no flex and straps in perfect spot. The carbon/balsa stiffener is the key - only weighs in at 0.5Kg with the bolts. Been toying with the idea for ages and pleased to say it works really well. I saw the Mobile attempt but theres too much flex in foil mode and they haven't got the straps in the right position.