It is, just stick it through your wheel, fasten it together and rest the ends on your cases/boxes/axle stands/bottles/wife/dogs - whatever and away you go.

let the wheel rotate until it stops and mark it at the bottom turn it and let it rest again, then again each time marking it - you will find the heaviest point. Then add some weights to the opposite side!

You get some plastic weights with it, I broke these up and tape them with masking tape, when I've found the right weight I get a nice new metal one (you can buy these in strips from evilbay) and fix them as per the instructions (clean wheel with cellulose thinners, dry and stick).

It's a piece of cake, and the craftmanship in the build is top notch.

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Never underestimate the power of stupid people in large groups.