I just bought the crankenstien 3D mill and put it together using the SLO Brewer Dave's Brewing Website to build a hopper and base. Its together and when i run the mill it keeps getting stuck. Im using a drill like most people, but i filled the hopper with like 1/2lb of grains to clean the rollers and when i powered it it was stuck. and had to go back and forth to get the grains milled. I also tried changing the spacing of the 3rd roller with the adjustment knob and it still wouldnt help. Im not sure if the mill is defective or what (prob not, just thinking the worst).. I understand if it gets stuck here n there but not with 1/2lb of grains... any help???????????