Funny you should bring that up. I was looking at my falcon blades wondering if I could do the same. It ought to lift off at about 200 rpm with those blades on it.
The blades weigh nearly as much as the rest of the heli! But it would be fun. Just hook the blades on with rubber bands for the trial run.
Hang on, what are you gonna use for upper blades?
You bugger - ya got me!