An example of what can be done with a BF20L and a 4th axis. Bjorn Maathuis has retrofit his BF20L with the DamenCNC direct drive retrofit kit. Further he has mounted a RT150 dividinghead to this BF20L, the 4th axis is also CNC controlled. He has used a DamenCNC RTR set for this purpose Running USBCNC software. It takes a while before you can make products like this, but its nice to see clients succeed.