USB version. With option Z=130mm. Good choice! With USB: Unzip Mach3 files. Copy Mach3 folder and .rar and 3 pdf files to desktop. Run Mach3...exe. Copy Mach3Mill.xml (=settings) and Mach1Lic.dat (=license) which are in folder English/Mach3USB to C:Mach3. Copy shuttlePro.dll and UsbMach-V3.dll which are in folder English/Mach3USB/Plugins to C:Mach3/PlugIns. That is all! After that machine runs ( x,y,z stepper motors and spindle motor) from laptop by USB! Came in shedule promised. In plywood box!
very good