Hiller open air helicopter XROE-1

What an awesome machine.
It's completely self-build and resembles a Hiller XROE-1 from the late 1950ies.
Here the corresponding Wikipedia article: en.wikipedia.org/wiki/Hiller_...
It flies very calmly, but it looks great and I like the sound.
I recorded this flight during the Loorholz Flugtage 2019 in Switzerland.

[@fredthefish6640]

How much does it cost to buy a kit for for one of those?

[@helisalrcvideos2440]

Sorry for the delay.
As this is not mine, I am not able to give you this information. Sorry.
As far as I know, this is a self-build model and not a kit. But I'm not sure about this.