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how would you machine this part?

how would you machine this part?

(OP)
Hello,

Im working with surfcam for quite a while, but generally im new to cnc. I was machining 2d parts and all was fine, but now i experienced a problem, i need to machine this part:

[IMG]http://img693.imageshack.us/img693/2438/81015607.jpg[/IMG]

I made it with solidworks. Using SurfCAM 4 sp1. Tried many different ways to machine it, but still cant get desired effect. If i use z rough and z finish option i get this terrible result:

[IMG]http://img829.imageshack.us/img829/6372/22686828.jpg[/IMG]

Have no idea why it leaves so much material. As far as i've got here i got some luck with 3axis planar operation, but still no even near desired.

The part will be made from MDF, so it can still be repaired a bit with hand tools. The borders between walls and that rise is 6mm, so i should be able to machine it with 6mm end mill and then end it with like 10mm ball mill.
Could some one help me with this? how would you do this?

Thanks in advance.

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