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and i can use blender for 3d printing too, so i could do it without learning autocad which i have used only few times

I'm afraid that if I open blender or any 3D modelling program it would crash my computer lol.

you must have a horrible computer then :D

At the moment I'm using a spare computer that is running ddr2 ram. So it is terrible. I'm waiting to get a new cpu for my 1151 motherboard.