What is best cnc (commercial or plans or design) of size of ( not routing area) 15" by 15" (inches) max
its need to be jack of all treads, but i know profiling cannot be done properly on such small machines. but pcb,v bit engraving, 3d relief should be done.

please dont give answer as microcarve a4, i know its good but i need other option.

or even some one will just help me in general about what type of gantry or linear system to choose , belt or screw etc..