I am using modified version of this cnc with smaller footprint (using 1000mm c-beams). Somehow getting vibration when cutting wood (slot cutting when whole bit engaged). Only way to get rid of it is to slide router all the way up in mounting bracket and even 5mm inside of backet. 1/4in 2 flute bit upcut or straight. 1500mm feed rate and 1.5mm doc. Change router speed dosnt help much. Feed rate too. Noticed that someweigh on top,of router reduce vibration.