Eugene drills holes into the curve for height-adjustability. 
David uses the mill machine to shave an aluminum tube down to the proper dimension.
David uses a die grinder to smooth out the edges of the body frame. 
John uses a chamfering tool in a drill to countersink the screw hole.
Spencer uses the slip roll machine to bend the curved base. 
Eugene uses the mill machine to shave an aluminum tube down to the proper dimension.
John and Spencer prepare the electronic system test bench.