In need of your expertise

I recently purchased this nag H78 retool and was wondering if you guys could shed some light onto the mask for me. What exactly is a “retool” and what does this marking mean inside the mask. Aside from his signature what does the numbers mean!? Sorry if this is a dumb question, take it easy on me!!
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15 means that’s his 15th pull. Retool would be Nik doing a claypress of his H78 and Retooling it. In other words adding more details and correcting the wrongs.

Gotcha! Thanks man!

:rock:

15 means the year, 2015

My bad about the number marking. I forgot it meant the year.