I want to stamp a part out of 6mm aluminium sheet. It's a simple profile with a few holes in it. I thought it would be cheaper to have a tool made and stamp them out, rather than CNC or laser cut. The bottom line is: UK supplier says it's possible. Chinese supplier says they can't do it unless I reduce the thickness to 4mm. I need to use the Chinese supplier for production. Can it really be that difficult to stamp 6mm? :x Thoughts?