I wish the Chinese would catch on with these mass produced CNC machines ...it's a chore for the average bloke in a shed to fit homing & limit switches after buying the machine - you'd think they'd have that covered off by now! Some of the control boxes I've seen for the 3040s at least have sockets to plug your self procured/fit switches into, but this is one of the control boxes that doesn't....not insurmountable, but really....tsk, tsk