Process

Building the capacitive sensor....
I want the sensors to lay under the tools. This means I want to build the board without any header pins. This worked out, but in hindsight, I would design my circuit with header pins and de-solder the header pins after programming.

The sensor was hand drawn using Pixlr. The image was then shrunk so that the chip size matched the Attiny45.

Soldering A 1M resistor was soldered between RX and Ground and RX and VCC. A 1uF capacitor was soldered between VCC and Ground. A jumper wire was wired to the back side of the Double PCB from the TX. In order to program the board, I soldered wires onto each of the programming Pins. At this point, the location of the pins is easy by memory, but for reference:
Pin 1 --> RST
Pin 2--> Not needed for programming
Pin 3 --> Not needed for programming
Pin 4 --> Ground
Pin 5 --> MOSI
Pin 6 --> MISO
Pin 7 --> SCK
Pin 8 --> VCC

Programming:
Arduino has an example to program the sensor:
I used the Capacitance Sensor Example sketch with only modification of the pins.
I used pins PB3 and PB4 as RX/TX.

                    CapacitiveSensor   cs_4_2 = CapacitiveSensor(4,2);
                 

becomes:

                     CapacitiveSensor   cs_4_3 = CapacitiveSensor(4,3);
                     

Only one sensor is needed because I choose to use microcontrollers on each sensor as opposed to one Attiny45 for 3 sensors.

                    CapacitiveSensor   cs_4_3 = CapacitiveSensor(4,3);

                    void setup(){
                       cs_4_3.set_CS_AutocaL_Millis(0xFFFFFFFF);
                       Serial.begin(9600);}

                    void loop(){
                        long total1 =  cs_4_e.capacitiveSensor(30);
                         Serial.print(total1);
                         delay(10);
                     }
                

The example gives a nice readout. However, there is a lag in the time, in which a tool is moved.

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Redesigning

After presenting my project(Jun 20), Neil suggested using the Capacitance Sensor in his example. This would solve two of my problems. I needed to ground my tools(physical contact) and I needed to acquire samples over about 10 seconds to account for noise.
My board was the same. Not suprising since I had looked at Neil's example and the example on the Arduino site before building my sensor.
The only thing that need to be done was a change in code.
I am still struggle with understanding Neil's Example Code. I will work on that. There are many references to the board that I have not learned and am struggling to grasp. However, the functionality of the code was the same, and my pins are the same as well.
I just have to pay attention to his ouput.(more on this in interfacing)