I just got a new clone that came with an ambi trigger pack. I decided to swap the semi lower that came with the clone to a 4 position lower. I followed the sticked instructions from the top of the forum. I can get the left side of the selector lever and axel in the lower and it moves freely from the safe to the semi position. However, when I mount the right selector lever on the axel the lever assembly freezes in the safe position. I've tried pushing down on the top lever to release pressure from the axel, but it won't budge with the right side of the selector installed. I think it has something to do with a ball and spring detent in the right side of the selector lever.