Hi Sabastian - Since your going to mainly cut foam I suggest you use a conventional long z axis, not the lifting gantry. I suggest that you design the spindle so it can be canted 45deg or even to horizontal. This means you can machine the left hand side with the tool leaned, this overcomes the collision angle issue. Then you manually cant to the other side and machine the right hand side. I did this on my first machine and it worked very well... You should consider a rotary platter and then you have a very good solution for this sort of task. The platter can be simply manually registered to four quadrants or can be under rotary axis control.. Peter