Hi Tony,
Great start on your new engine. I have to ask this question. In the picture of your crank you show the thicker counterbalance side and a thinner opposite side. With my experience building engines I have found that the crank pin needs to be pinned or pressed well enough to prevent the two crank halves from twisting. With your thinner side it doesn't look like there's much press or pin room to hold it secure. Not a criticism but just an observation.
gbritnell