Arduino Makestudio Relay Shield spacers

Using Arduino Makerstudio Relay Shield (http://makerstudio.cc/index.php?main_page=product_info&cPath=39&products_id=319) I got some problem due to the length of pin: on the side of ICSP connector the shield remains higher than the USB side, so I've designed 4 spacers for put the shield on the right distance.

In the STL there were also 4 columns to fix the Arduino Board on a pannel: use M3 screw.