Wonky Housetop Blocks

It's my turn to request and receive blocks for another Do Good Stitches group quilt. This month I'm requesting wonky housetop blocks, 12.5" unfinished, with only two rounds of fabric around the center. I thought I'd write a tutorial on how I approached this; this isn't the only way to make these, but hopefully this method will consistently produce blocks of the desired size.

For one block, make the following fabric cuts:

Fabric 1:

(1) 4" - 4.5" square

Fabric 2:

(2) 3" x 4.5" rectangles

(2) 3" x 10" rectangles

Fabric 3:

(2) 3.5" x 10" rectangles 

(2) 3.5" x 13.5" rectangles

The center piece (fabric 1) does not have to start out as a square, and it can be slightly smaller if it does not need to be trimmed.

If you are starting with a square, trim two opposite sides at slight angles:

Attach a 3" x 4.5" rectangle of Fabric 2 to the sides just trimmed; press.

Now trim the other two sides at slight angles:

Sew the remaining Fabric 2 rectangles to these sides and press.

Trim two sides again; try to keep the narrowest part at least 7.5" wide (it should be ok if it's a little less):

(Please excuse the glare on the ruler.)

Sew the 3.5" x 10" rectangles of Fabric 3 to the trimmed sides.

Trim two sides yet again, still aiming to keep the width at least 7.5" (notice how little I trimmed from the narrow part of Fabric 2):

Sew the remaining Fabric 3 rectangles to these sides, press, and trim to a 12.5" square.

I used 3" strips for Fabric 3, which worked but gave me little leeway when it came to the final trim.

3.25" strips should be fine if you are careful not to trim too much; 3.5" strips should give more margin for error and plenty of freedom for the final trim to be at a wonky angle.

Here's my finished block:

And a second block: