Updated Appendix D: Hardware (markdown)

Appendix-D:-Hardware.md

@@ -1,5 +1,5 @@
 # Buying hardware from us
-Getting all of the hardware can be very wasteful, since you'll often only need a small number of parts, and these parts tend to come in large packs, meaning you'll be spending lots of money for spares you may not need. That's why we sell sets of Ploopy Mouse hardware **TODO put link to ploopy.co store here**. Here's why that's great for you:
+Getting all of the hardware on your own can be very wasteful, since you'll often only need a small number of parts, and these parts tend to come in large packs, meaning you'll be spending lots of money for spares you may not need. That's why we sell sets of Ploopy Mouse hardware **TODO put link to ploopy.co store here**. Here's why that's great for you:
 
 - Everything is guaranteed to fit together perfectly
 - You'll end up saving money - probably quite a bit of money - by not spending on spares
@@ -69,18 +69,21 @@ Here are the critical specifications:
 - 18mm length
 
 ## Silicone ring
-We use decorative rings for this. If it's silicone and size 10 (or 19.8mm in diameter), it'll probably work, so long as it can be cut to size.
+We use decorative rings for this. Here are the critical specifications:
+
+- Size 10 (19.8mm diameter)
+- Width between 8.0mm and 8.7mm
 
 ## Friction pads
 Here are the critical specifications:
 
 - Circular shape
-- 3/4" diameter
-- 1/16" thickness
+- Up to 3/4" diameter
+- Up to 1/8" thickness
 - Non-slip
 
 ## Snooker ball
-So long as it's a 1.75-inch diameter (44.45mm) ball, it'll work.
+We use 1.75-inch diameter (44.45mm) miniature snooker balls. Any ball between 44.0mm and 44.6mm will work.
 
 ## That's it!
 Ordered everything? Great! That's another thing dealt with. Head over to [[1. Introduction]] to keep on keeping on.