TVS900 Basics

[Savvy]

My edit didn't take..... there was a smiley in.there.

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And the second part of the edit didn't stay either.... odd. Is the taper a straight one or curved to.the bottom?

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I would have finished off the inside of those ports first. If that is the critical finish you are concerned with. It'll be easier to cut down the chatter with the solid block of material.

Then you could rig a simple fixture to locate and hold off of the finished ports to do your machining on the the outside. Order of operations is the trick for chatter sometimes.