docs: clarify instructions on attaching CPE board to backpack, in par…

…t by returning to the original assembly sequence. My attempt at a shortcut was not really successful. This should address issue #3

Signed-off-by: Ron Evans <[email protected]>

assembly/backpack.md

@@ -26,6 +26,22 @@ Pass the end of the first shorter elastic strap thru both bottom holes on one si
 
 Pass the end of the second shorter elastic strap thru both bottom holes on one side of the backpack. Tie an overhand knot on each end and tie the two ends together.
 
+## Attach Circuit Playground Express to backpack
+
+![Kit](./images/backpack/attach-cpe.png)
+
+Finish attaching the Circuit Playground Express to backpack using four 10mm machine screws, four M3 washers, and four M3 nuts.
+
+Slip a washer between the back of the board and the standoff, then pass one 10mm machine screw thru the front of the circuit board.
+
+Screw a nut loosely on the back of the machine screw just enough so it does not fall off. It will be tightened down in an upcoming step.
+
+Now attach the remaining machine screws, washers, and nuts, in the same way that you did the first one.
+
+Once all four screws are in place, you can tighten them completely.
+
+The idea is that since there are 2 fork terminals that are connected between the back of the Circuit Playground Express and the standoffs on the backpack, we need the 4 washers to act as spacers so that the Circuit Playground Express board sits evenly on all 6 of the standoffs.
+
 ## Put the helmet and backpack on plushie
 
 ![Kit](./images/backpack/add-backpack.png)

assembly/visor.md

@@ -74,16 +74,6 @@ Connect the green wire's fork connector to the back side of the Circuit Playgrou
 
 Connect the blue wire's fork connector to the back side of the Circuit Playground Express "A2" terminal using the 6mm machine screw and one of the M3 nuts.
 
-## Attach Circuit Playground Express to backpack
-
-![Kit](./images/backpack/attach-cpe.png)
-
-Attach the Circuit Playground Express to backpack using four 10mm machine screws, four M3 washers, and four M3 nuts.
-
-Pass one 10mm machine screw thru the front of the circuit board, put a washer on the screw on the back of the board then place the Circuit Playground Express on the backpack.
-
-Screw the nuts loosely on the back of the machine screws just enough so they do not fall off. They will be tightened down in an upcoming step.
-
 ## Attach ribbon cable red and black/white wires to Circuit Playground Express and backpack
 
 Attach ribbon cable to Circuit Playground Express using the fork connectors.
@@ -98,10 +88,6 @@ Connect the red wire's fork connector to the back side of the Circuit Playground
 
 Connect the white and black wire's fork connector to the back side of the Circuit Playground Express "GND" terminal using the 10mm machine screw and one of the M3 nuts.
 
-## Finish attaching Circuit Playground Express to Backpack
-
-Now tighten down the rest of the screws that hold the Circuit Playground Express to Backpack.
-
 ## Test the RGB LED strip
 
 Run a test program to make sure that the LEDs are wired correctly by plugging in the Circuit Playground Express to a battery or your computer's USB port. If the RGB LED strip does not light up, it might be due to a mis-aligned "+" connector inside the plastic housing. For information on how to correct this, [click here]().