I am a newbie who is looking to build a table top router CNC. Before I start buying parts I need some help in the design. I want to my unit to be about 2 foot by 2 foot. (size also depends on what parts I find on Ebay)

However, I have a design question....Moving gantry or moving stage? Does anyone have any opinions on this for a small unit like this? I've also seen a small unit..(couldn't find the picture again) that has an open ended gantry. Is this a design problem?

Thanks