Speedmaster intake porting. Hopefully I can make something out of this

PRH said
My version of “burr finish” is to just skip that sandpaper rolls.

So, for me...... it is a time saver.

I just use an old dull carbide for ferrous metals....... and call it good.

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It’s all about the speed and using the right (double-cut) burr. You have to be able to control it.