Drooping Helicopter Rotor Blades

I don't normally go for helicopters but do have a couple in the un-built stash. When I pulled out the ancient Airfix Whirlwind as a project on which to hone skills after a period of inactivity, my thoughts turned to the problem of drooping the rotor blades. Static models without this feature look silly. The real things droop and so must their model counterparts.
The traditional method demands playing chicken run, running the blade across a candle flame, risking terminal melt-down in the process. This game involves so many variables that I gave some thought to an alternative.
Here we have the Mk1 drooping jig:

Made from pine, the top profile is curved with radius increasing with distance from the blade root, which is slid under a permanently fixed nylon cable tie.
Having first tried the heat from our daughter's volcanic hair drier, which had absolutely no effect whatever, I poured nearly-boiling water over the blades, working from the root outwards at a steady speed over a few seconds.
The result was very pleasing with a convincing and consistent droop to all three blades. This piece of kit will be saved for future helio builds.
Do try this on a scrap blade or two first and do make sure that you insert the blades with the underside down!!!