I have spent a bunch of time today looking for this discontinued Brainstring R puzzle. Wondering if there might be sites selling a used one? Tried EBay, Etsy, Amazon. Posting here to
Brainstring „R“ » Spilavinir
Brainstring R from Recent Toys - Review - YouTube
Casse-tête Brainstring R - Recent Toys | Ecoterre
Brainstring 'R' | Oskar van Deventer | Puzzle Master Inc