spoilboard preperation

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    I am wondering what a good way to prep a spoilboard is.  I think i’m about .1mm off from side to side based on the pressure of a pen in my crown test.  I want to add aluminum T slots into the board so I have a place to secure hold downs.

    I was thinking of using this endmill to make the T slots.


    and using a flat 1/8″ head in .5mm passes to flatten the spilboard


    any advice is welcome


    Thanks 🙂



    0.1mm off. I have never needed to worry in the slightest about that sort of resolution on the Z axis.

    Any bit can take a surface pass, larger the better since you will not be taking more than a smidge off.


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