Sprocket quilt along: the details

I named this pattern Sprocket after seeing the first finished unit. It just seemed to fit. Plus, it's the name of my uncle's cat!

I'm really enjoying working on it. I'm so glad I took the time to plan out a handwork project. It turns out I have a few minutes here and there for hand stitching and it's great to have something ready to go when they happen. In case you'd also like to try this pattern I'll give the how-to step by step.

Here are the posts I've done so far:
Making a travel sewing kit
Making your own paper piecing templates
Cutting fabric
How to love English Paper Piecing
Basting Paper Pieces
Piecing Paddles
Constructing a Sprocket

Background

I'm using a method called English paper piecing. This means I wrap fabric around paper and temporarily baste it to hold it in a particular shape. After stitching those shapes together, the paper is removed. Simple precision patchwork by hand. Low stress. Go at your own pace.
The pattern requires two paper shapes: diamonds and hexagons. Both these shapes are measured by the length of one side. I'm using two inch diamonds and four inch hexagons. Of course, the pattern would also work in different sizes, as long as your hexagon sides are twice as long as your diamond sides. Thank you, geometry, for being so cooperative.

Layout

My quilt will have five vertical columns. Each column will have five and a half of the sprockets. Total: 25 full sprockets, 5 half sprockets. Why the half sprockets? I like the extending-off-the-edge look of my mockup.

The finished quilt should be 63 x 76 inches. Maybe you want a different size. This info will help you plan it:

Paper requirements:

A sprocket takes 36 diamonds and one hexagon. Once it's constructed, you can remove the 18 inner diamonds. The outer 18 will stay in until you've sewn all the edges around them.
I ordered paper piecing templates from here. They are so quick to ship. I ordered 500+ 2-inch diamonds and a small batch of 4-inch hexagons. They are the six point (60 degree) diamonds. If you just want to try the pattern you could get a small bag of 75 diamonds and draft your own hexagon (not hard, I'll show you how). You can finish three hexagons with that one bag, probably enough to know if you want to continue.
You could cut your own diamond templates instead. Sounds tedious to me, but we'll get to that.

Fabric requirements:

Hexagons: 1.25-1.5 yards (I easily got mine from 1.25 but it never hurts to have a little extra just in case!)
Background for 445 diamonds and finishing the edges: 3.25-3.5 yards.
Sprockets: you'll need 450 colored diamonds. You can get this from 15 fat quarters (30 diamonds per fat quarter) or 38 strips 2.5 inches wide (12 diamonds per strip)

Ok enough with the numbers. Back to sewing!