Hello, CC members!
I offer Rocourt's climbing platform for ascents in caves.
http://www.ebay.com/itm/321233302568
Inspired by Castleguard cave's 200-foot aven ascent by Marek Vokac in 2005.
Tested during summer expedititon to Kuzgun cave (-1400) in Aladaglar Karst Massif (East Taurus, Turkey) in July, 2013.
Photos are here: http://speleoukraine.org/index.php/ru/dejatelnost/proekty-usa/zov-bezdny/507-zov-bezdny-aladaglar-2013-fotootchet
Easy to disassemble and transport in regular caving transport bag.
Aluminum square tubes, steel fixtures and 2 mm cable.
Ready to answer you questions.
P. S.Also check out dry suit for wet caving and passing sumps