The parts list:
Square Steel Tubing Shelf-custom-made from a local shop,=$12.00
Grinder Drill - $7.00- THK Linear Slide Rail - $10.00
Linear Slide- $10.00-ordered from a local factory
MISC. Springs,Screws - from local hardware Shop
a 3 pin switch and a female head of a 12V line.$1.00 Note:the line has 2 thread,one connect to one rotor pin,another thread connect to switch pin,another pin from the switch connect to rotor another pin,the misconnect the pin on the rotor only result in rotor spinning the counterclockwise way.