Drag Knife basics?

[mristau]

Need help.
Built drag knife after looking at several other designs but it does not behave nicely.
Using two sealed bearings. So, it turns very easily. I have the blade point .075" behind center.
Code is from Vectric Cut2D drag knife widget. Any guidance greatly appreciated.
pdf drawing attached

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[LeeWay]

I don't have one yet, but how is it misbehaving? I would imagine that the correct cutting height would also be and integral part of the setup. Along with the offset geometry and CAM that can use it.

[Jon.N.CNC]

Keep playing with the settings, they take some fine tuning.