Where's Majid when you need "twenty seven eight-by-ten colour glossy photographs with circles and arrows and a paragraph on the back of each one" ?
Explaining what each one was... and not to mention the aerial photography.
Edited to add:
And oh yeah, to the OP.. YER GONNA DIE.
P.S. It sounds like a bad idea. Just go with a tried and true method. You don't want your whole contraption coming undone while bouncing down the rappel.