Arduino testing station

I tweaked the design for a current test platform i needed with a relay and potentiometer for a new project. The LCD mount in this mod is in the link below.

According to Simplify3D the scale is ( 2540.00 ) in ( X, Y & Z ) axis. The program does this automatically for me so i guess non users will need to scale accordingly.

IIC/I2C/TWI 1602 Serial Blue Backlight LCD Display For Arduino off ebay:

http://www.ebay.com/itm/221935534466?_trksid=p2057872.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT

3-Pin Rotary Potentiometer

http://www.ebay.com/itm/321882482150?_trksid=p2057872.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT