Can the HMC40 be used on a Glidecam 4000? The Glidecam is designed for cameras weighing 4-8lbs. so I am a little leary. I am debating whether to rent the HMC40 or a Sony Z7U camera for a wedding that I've got coming up. The Z7U would surely work but is also about 175 bucks more to rent. Thoughts here?