I have solved and reset this puzzle several times. It works great!
Per the Karakuri website:
More here: https://karakuri.gr.jp/en/products/rf-57/
The puzzle is located in the United States, but I will ship
worldwide.
Customs forms for international shipments will reflect actual
payments.
Payments can be made through PayPal (Friends & Family preferred).
Buyer to pay shipping calculated after auction.
Buyer may choose supplemental insurance at their expense.
Please wait for the updated invoice before making payment.