Polaroid back for SL66

On ebay you can find a few of these 'Arca Swiss' Polaroid backs for the SL66.
Asking price at the moment Euro 129,-, I don't know if this is reasonable.
Anyone used one of these, any experience with them ?
I would love to try this out and see what sort of results you get.

Jos.

Can anyone confirm that the Fuji FP100 C peel apart film is the correct type for the SL66 polaroid back ?
Can't find information on internet about this.
Not many people have used/using this back

Cheers,
Jos.

(there was a url link here which no longer exists)

Yes; this is with RZ pola and 3000B b+w but the 100C fits also in the SL66 Pola back; same film size different connection.