diff --git a/BOM.md b/BOM.md
index 7f21dfb..ceb9754 100644
--- a/BOM.md
+++ b/BOM.md
@@ -4,20 +4,20 @@
 | Name | Qty | Description | Comments | Suggested link |
 |------|-----|--------------|-----------|----------------|
 | Steel ball | 12 | Ø1.25 mm (0.05") | Precision G10 or better. Can be sourced from small ball bearings | |
-| PU stretch cord | 1 m | Ø1mm | e.g. "Stretch Magic" or "Magic String" | |
+| PU stretch cord | 1 m | Ø1mm | e.g. "Stretch Magic" or "Magic String" | [Aliexpress](https://www.aliexpress.us/item/3256805953910514.html)|
 | Neodym Cylinder Magnet | 70 | Ø3mm h=4 mm | N42 Grade | [Ebay Link](https://www.ebay.de/itm/365333642187?var=635110190027) |
-| Brass Pipe | 1 m | OD=Ø2mm ID=Ø1 mm |  | |
+| Brass Pipe | 1 m | OD=Ø2mm ID=Ø1 mm |  | [Amazon](https://a.co/d/1pRFmtf)|
 | M2 Screw | 12 | M2×12 mm, Countersunk |  | |
 | M3 Grub Screw | 6 | M3×4 |  | |
 
 ## Electronics
 | Name | Qty | Description | Comments | Suggested link |
 |------|-----|--------------|-----------|----------------|
-| DC-DC Step Down Module | 1 | 4.75–23 V Step-Down Buck Converter |  | |
+| DC-DC Step Down Module | 1 | 4.75–23 V Step-Down Buck Converter |  | [Aliexpress](https://www.aliexpress.us/item/3256806752772875.html)|
 | (1N5819) OR (PMEG4010) | 1 | Diode (through-hole or SMD) |  | |
 | Raspberry Pi Pico 2 | 1 | Microcontroller board |  | |
-| MT6835 Magnetic Encoder Module | 3 | Magnetic encoder |  | |
-| TB6612FNG Driver | 3 | |  | |
+| MT6835 Magnetic Encoder Module | 3 | Magnetic encoder |  | [Aliexpress](https://www.aliexpress.us/item/3256808005140674.html)|
+| TB6612FNG Driver | 3 | |  | [Aliexpress](https://www.aliexpress.us/item/3256806060073976.html)|
 | 470 µF Electrolytic Capacitor | 3 | > 100 µF | anything > 100µF will work well | |
 | 10 µF Ceramic Capacitor 0603 | 3 | Optional |  | |
 | 4.7 k Resistor 0603 | 2 | Optional |  | |