I know Ern I'm working on itto makeit easier to understand.

The parts to make the entire moving commander are:

Copper PCB Board $4.00 Makes about six boards
Copper Etch $10.00 Makes a lot
IN4004 Diode $2.00 Need 4
220 Ohm 1/4 Watt Resistor $0.99 Makes 5
SPDT 6VDC 8 Pin Relay $1.49 Getting hard to find
1K 1/4 Watt Resistor $3.00 For 100
Round Bead Board $3.00 Used for Base
58:1 Gear Head Motor $11.50
2N2222 Transistor $1.29 Makes 5
Micro Reed Switches $1.20 Need 2
Wire $.060 Average
Solder $.075 Guess but not much needed
Brass $5.50 Various sizes

Wathcing your little TC move Priceless!