http://www.youtube.com/watch?v=WvjIpcsq18s (http://www.youtube.com/watch?v=WvjIpcsq18s)
150 gr looses 135 mm vs 1100 gr gains 25 mm. (150 grams is the weight on the wheel, 1100 grams is the weight of the entire pendulum arm and wheel not including the top hub. The balance point of the complete pendulum assembly is at 2 cm above the wheel axle).
And for a litle fun, because where would we be if there was no fun in our hobby... http://www.youtube.com/watch?v=NhKiKvfnrv4 (http://www.youtube.com/watch?v=NhKiKvfnrv4)