Created Appendix C: Hardware (markdown)

Appendix-C:-Hardware.md

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+# Buying hardware from us
+
+Getting all of the hardware on your own can be tricky because the parts you select may not fit perfectly. [That's why we sell kits with everything you need to build a Ploopy Mouse](https://ploopy.co/product-category/mouse/). Here's why that's great for you:
+
+- Everything is guaranteed to fit together perfectly
+- Everything is guaranteed to work as intended
+- You'll end up saving money - probably quite a bit of money - by not spending on extra parts
+
+Your call. You'll sort it out.
+
+# Getting your own hardware
+
+This guide was a bit light on detail in the other sections, and that's because the hardware has to conform to many specifications. They'll all be listed here.
+
+First, a complete list of all the hardware you'll need:
+
+- 8x No. 2 x 3/8" flat-head plastic screw
+- 1x 3mm x 18mm metal dowels
+- 2x 213 O-ring
+- 4x anti-stick pads
+
+We'll be going over all of them in detail. There will be mentions of *critical specifications*; if you're going to be sourcing your own parts, **you must get parts that conform to the critical specifications**. If you go off-menu, the parts will not fit the way that we intended when we designed the Mouse. That might mean that your Mouse **doesn't work**.
+
+Let's get cracking.
+
+## No. 2 x 3/8" flat-head plastic screw
+
+Here are the critical specifications:
+
+- No. 2
+- 3/8" length
+- Flat-head
+- 0.076" hole
+
+## 3mm x 18mm metal dowels
+
+Here are the critical specifications:
+
+- 3mm diameter
+- 18mm length
+
+## 213 O-ring
+
+We use standard O-rings for this. Here are the critical specifications:
+
+- Size 213
+
+## Anti-stick pads
+
+Here are the critical specifications:
+
+- HDPE, UHMW, or PTFE, depending on preference