Addon hexing/ material/ holdype problem (Video)

Hi, i have a few problems with my addons that i thought some of you guys could help with.
I felt that it would be a bit eaier to make a video showing whats wrong than having to write it all down.

I hope some of you can help me.

Thanks

Video: https://www.youtube.com/watch?v=tFG2S6UMrUk&feature=youtu.be

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