Mild Steel Fixture Plate for 440

Hello all, I just recently picked up a PNC 440 and have done a lot of reading. I was interested in a fixture plate so I am deciding to make one from mild steel. I got a piece from work for relatively cheap (7/8" X 10" X8"). I’m well aware of what happens to mild hot rolled steel when machined.
Plate design: holes spaced 1.25" apart in either direction. Each hole will be 1/2-13 thd with Half the depth being reamed out for 1/2 dowels. Pretty simple design.
I know people have done it with aluminum or 4140 steel. Has anyone here made their own plate?

I’m case you haven’t bumped into these videos yet NYC CNC did a few videos on fixture plates before they started selling them.

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