Dismantling a Profurl headfoil in situ?

Quandary

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When I was hoisting our furling genoa for the first time this season it jammed half way up, eventually we managed to drag it back down to discover that the foil had parted at the jam with a gap of about 50mm. at the joint where the car had stuck about 25' above the deck. A lot of jiggling closed the gap by about half but obviously it needs to be closed completely to let the car by.
I am prepared to go up and try loosening the grub screws that hold the sections together to close the gap but my leverage and comfort will be limited by my position hanging in space supported by the thing I am trying to work on so I expect that this may prove not to be successful.
I do not want to take the mast down again so soon and anyway Scottish Canals where the boat is berthed do not permit basic crane or hiab operations without massive manpower standing around, security fencing etc. and reams of documentation. It would be horrendously expensive and they will ask for a notice period of months. I did explore taking her into the sea lock at low tide after hours but the fault is too high to reach there. So I have been considering if my aerial efforts are not successful, if it may be possible to strip the foil section by section from the bottom with the forestay in situ.
Anyone with any Profurl experience know if this might be feasible? The parts look a lot more complicated than the Furlex I am used to.
 
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