Hi,

First I'm going to warn you that I don't know a thing about lathes / CNC...

Take the thing on this page:

http://www.japantrendshop.com/ice-ba...res-p-244.html

While the small version is fairly cheap ($216) the next smallest is way more expensive ($1393).

Could someone explain to me if there is any technical reason for this (material cost? production time? complications to create a sphere that big? size?). It's just a big block of aluminium with a sphere cut out :whistling:

How much do you recon it would cost me if I wanted someone to create a similar device for me? (for a 55mm sphere), around the same or could I get off cheaper?

Thanks,
Andreas