Is anybody familiar with the "jackhammer" rotary machine? I know its not the greatest but if you have it and know what it is what can be done to fix it into a more solid machine? I did two lines and it wouldnt come back on, tried it later and it ran fine, my thoughts are possibly loose wires inside and also has anyone ever had to tighten all the bolts on a new machine? You know like when you buy a bicycle you usually want to tighten everything yourself