Stumbling Blocks was designed by Pit Khiam Goh and this copy was crafted by Eric Fuller and the team at Cubic Dissection.
This puzzle is in excellent condition and is made of Ash, Walnut, and Sapele.
Description from the website...
"Stumbling Blocks is a brilliant puzzle that I've been wanting to make
for a while. When Pit mentioned that he had a more difficult version I
jumped at the chance to make it. Packing the four pieces into the frame
is the goal, and the way to get there is amazing. I can't tell much
about this puzzle without giving things away, but I'll say that it has
one of the best "Ah-ha!" moments I've seen for a while. The movement of
the pieces is beautiful and this puzzle rates incredibly high in overall
satisfaction."
Buyer pays winning bid plus $12 shipping/PayPal fees to USA only please. Ships disassembled.