12 Arrow heads smithing recipe

[Padwan]

The smithing recipe for 9 arrow heads could be expanded to 12 arrow heads if it used a shape like this:

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|## # ## #|
|# ## # ##|
|         |
|## # ## #| 
|# ## # ##|
|         |
|## # ## #| 
|# ## # ##|
|         |
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It would theoretically stll be possible to smith this from just 1 ingot but would take a lot of time and skill. Most people would probably use it to make the heads from a metal plate so it would have the same arrows heads per ingot ratio as the 6 head recipe.