Update README.md

NeoPixel Beam Holder/README.md

@@ -2,14 +2,20 @@
 
 The NeoPixel Beam Holder allows you to attach an Addressable RGB LED Strip (commonly referred to as a "NeoPixel Strip") using LEGO Technic Pins.
 
-There are two versions, one that mounts the NeoPixel Strip on the topm and one that mounts it on the side.
+There are two versions, one that mounts the NeoPixel Strip on the top and one that mounts it on the side.
 
-See the full guide for assembly and use instructions: [NeoPixel Beam Holder](https://learn.browndoggadgets.com/Guide/)
+See the full guide for assembly and use instructions: [NeoPixel Beam Holder](https://learn.browndoggadgets.com/Guide/NeoPixel+Beam+Holder/707)
 
 These files can be printed on a standard FFF (Fused Filament Fabrication) desktop printer without support.
 
 Check out our other [3D Printed Parts](https://learn.browndoggadgets.com/c/3D_Printed_Parts) as well.
 
+### 3mm Hardware
+
+You'll need two 3mm pan head screws. They should be between 6mm long and 10mm long.
+
+- 2 x [Metric machine screws, Phillips pan head, Zinc plated steel, 3mm x 0.5mm x 10mm](https://www.boltdepot.com/Product-Details.aspx?product=17868)
+
 
 ![](Images/NeoPixel-Beam-Holder-Top-Render.png)