Still have some R141B around, and it is a great cleaner as well. Buy it in 5l plastic drums as well, or a 20l steel drum. It is now in a disposacan and is pressurised with R22 to clean out burn ups from compressor failures. At least is is less of a carcinogen than the Trichlorethane in the video, though I did use that as a cleaner, magic at cleaning to bare metal. Leave a board in it too long and it becomes copper traces in gel.