Mudballs, I agree. It looks like the process probably could be made at home to a somewhat reasonable cost but the kits like the one in the link doesn't guarantee a successful clone with cannabis. I would be more convinced if Bill Graham show us examples with cannabis instead of redwood.
Native Humboldt, great news that I could get the needed equipment for $ 100. It's less then half the price I found so far.. Sorry to hear that you didn't succeed in finding a working formula for cannabis.
Some Asian scientists have published a study on tissue cloning of cannabis. Do you think it can be useful for growers like us? -->
http://www.pakbs.org/pjbot/PDFs/41(2)/PJB41(2)603.pdf