For the interested, there are images of various cocking techniques, including with Mark's wrench under "Disassembly and Reassembly" in the LCSCA FAQs
https://lcsca.clubexpress.com/content.aspx?page_id=274&club_id=43784

The cocking arms is tuned DOWN to cock the hammer. I would suggest wrapping the wrench with electrical tape.

[Linked Image from photos.smugmug.com]