Hello, I am totally new to this, have read a lot of reviews/ comparisons and keep coming back to OneCNC Mill for it's capabilities and transfer-ability. I am looking to buy a used seat (license) of XR4 or XR5 Mill. I'm not too concerned with which level of software as I will be upgrading when my needs and knowledge grow. I will be doing some prototype work in 2.5D and eventually 3D. Thank you for any help or leads!