Hi there,
Just joined this forum. You are right the Waltzer is a fantastic, old ride. I live in the UK now where they appear at every fun fair, always with at least 2-3 guys riding the platform to ensure the cars spin like crazy. The Brisbane EKKA used to have 2 similar rides but we are talking back in the 70's. The Whirl-a-Whirl and the Tilt-a-Whirl.
Both basically the same as each other with the later having no canopy so open to the elements. If you ever get over to the UK you will be sure to be able to ride one they really are fantastic.
cheers