Petzl approves use of top hole on hand ascenders?
Richard Tregoweth, Thursday, February 09, 2012

To date there has been no official documentation (from hand ascender manufacturers at least) endorsing the use of top holes on these devices for life support connection.
Jords Climbing Corner have questioned whether the practice is now officially accepted by Petzl with their latest news release titled "Self-Belay: one single rope ..