Improve build instructions

README.md

@@ -31,14 +31,17 @@ I usually order from JLC with the cheapest options, make sure to choose the manu
 
 Assembly Guides: [Board A](https://fasttube.de/bestueckung/FaSTGLETree/A.html), [Board B](https://fasttube.de/bestueckung/FaSTGLETree/B.html)
 
-- It's recommended to make sure each PCB is in the best state it can be in first before combining them. Afterwards, soldering becomes more difficult.
+- It's recommended to make sure each PCB is in the best state it can be in and has no short circuits before combining them. Afterwards, soldering becomes more difficult.
 - For SMD parts, always solder a single pad/pin first before continuing to others
+- Paz attention to the Pin-1-Marker! On ICs, it's usually a dot, circle or line. On the PCB, it's either an elongated line or a triangle.
 - Pin 1 markings are the elongated silkscreen line and the dot/line on the IC
 - LED directions are not marked. The LED arrow should always point to the tree trunk/inwards (Anode to tip of branch)
+- The kit usually includes 3 or 4 different colors of LEDs. It's recommended to try and spread all colors across each visible surface.
 - There's no pattern to whether the LED or Resistor is on top on the LED branches. Always check the assembly guide!
 - J9 is usually not populated, it's left for external power
 - The THT LED atop should have its leads shortened to ~7-10mm
 - The THT LED atop is oriented using the flat side of its rim. The Flat side goes to the straight line, the round side to the rounded line
+- Insert the coin cell with the + facing away from the tree's stem.
 - Keep in mind the Errata section below
 
 # Errata