Freon: Freeze On Neck personal cooler !

I decided to try the 3D printing service @PCBway.

Ordering was quite simple as I chose standard PETG filament and came very soon to the Request For Quotation button!

However, for the bottom part of the enclosure I wanted to insert 3x M3 hex nuts during the printing time.

This should be done just before "closing" the top of the hex nut foot print with a "fake" color change at these Z height:

3 nuts should be inserted. 

One at Z = 4.2 mm for one nut

one at Z = 10.4mm for 2 nuts

A sentence was added for this into the "other special request" at the bottom of the form

This of course was not a standard order and almost immediately I received a mail to ask for explainations. 

This was on a friday evening... and all the mail discussions and further audit of my request were handled during the week end and even during night hours in China.

Later I got the explaination : "In order to provide faster services for customers, we have some staff scheduled on weekends, and some operate on a three-shift system"

This quality of service is simply impressive, my enclosure could jump into production on monday morning after payment!

And here is the result : perfect !