I am making some holders for some tools and want to cut recesses in MDF the shape of the tool. I'm using the 1/8 straight carving bit and when I make a rectangle in designer that is 2.5x0.75 it comes out 2.64x0.88. A hole that is set to .782 dia comes out at .92. Each of the shapes is off but it isn't consistent. They're off by .138, .122, .140, .130, .137, .139. If it was off by .125 I would understand it's the diameter of the bit but the inconsistency is driving me crazy. The couple of rectangles I have set up as regions so I don't see where to set an offset or move the bit to the inside or the outside. Do I have to do the math every time I want something to come out exact? I've attached the MPC. I did switch the circles to DRILL to see if that makes a difference but I won't get to carve that until tomorrow.

Thanks!DadaoSetup&Gaps.mpc