fixed some image alignment

assembly.md

@@ -3,6 +3,7 @@
 An idiot's guide to assembling the Horizontal WavetablePi by @sweetlilmre
 
 <img src='img/finished_front_side.PNG' alt='WavetablePi completed, front side' width=300>
+
 <img src='img/finished_back_side.PNG' alt='WavetablePi completed, front side' width=300>
 
 ## Introduction
@@ -41,9 +42,13 @@ I found assembling this board quite tricky, especially in terms of the order of
     - Mask off the area that will be between the Pi and the board with tape to prevent any potential shorts / issues. Kapton tape or even elecrical tape will do.
   - Soldering the 40-pin header and removing the plastic spacer can be tricky:
     - Push the plastic spacer of the 40 pin header down the pins, using a hard flat surface to make sure all pins are aligned:
-    <img src='img/flat_pins.png' alt='Flattened 40 pin header'>
+
+    - <img src='img/flat_pins.png' alt='Flattened 40 pin header'>
+
     - Push the header through the holes on the front of the board:
-    <img src='img/pins_through_board.PNG' alt='Flattened 40 pin header'>
+
+    - <img src='img/pins_through_board.PNG' alt='Flattened 40 pin header'>
+
     - Place the Pi on top of the header pins, push the Pi down against the board and solder the pins to the Pi.
     - Trim the pins on the Pi side of the board and flip the board over.
     - Working from one end, pry up the plastic spacer and remove it (it may help to use a cutting tool to separate the spacer every 3 or 4 sets of pins).
@@ -54,13 +59,13 @@ I found assembling this board quite tricky, especially in terms of the order of
 
 ## Final assembly
 
-If you are using the DAC module:
-- ensure that the jumpers on the DAC are configured according to [this guide](https://github.com/dwhinham/mt32-pi/wiki/GY-PCM5102-DAC-module) before soldering the DAC to the board.
+- If you are using the DAC module:
+  - ensure that the jumpers on the DAC are configured according to [this guide](https://github.com/dwhinham/mt32-pi/wiki/GY-PCM5102-DAC-module) before soldering the DAC to the board.
 
-<img src='https://github.com/dwhinham/mt32-pi/wiki/images/gypcm5102_jumpers.png' alt='PCM5102A jumpers' height=200 width=auto>
+  - <img src='https://github.com/dwhinham/mt32-pi/wiki/images/gypcm5102_jumpers.png' alt='PCM5102A jumpers' height=200 width=auto>
 
-- Solder the DAC module to the board.
-
-Set the jumpers on the Audio Select header to the desired configuration.
+  - Solder the DAC module to the board.
 
+- Set the jumpers on the Audio Select header to the desired configuration.
 
+- Enjoy your new Horizontal WavetablePi!