Thanks for those links. I went ahead and ordered the PayandPack motor from Amazon yesterday and got it today. It's installed (no problems at all), and it is very quiet. Still, something is impeding the turning of the platter, and I believe that either the weld on the bottom shelf is not true, or the shaft itself is not straight-although I did put a level up against the shaft and it was as straight as straight can be. Also, whatever is going on with the platter is causing it to wobble as it turns. Maybe tilt is a better description than wobble. As it turns,it begins to dip on the side opposite the burner, so that the burner side of the platter is raised...and quite a bit. At some point in each turn, the platter is level with a good 1/2 gap between the bottom of it and the shelf. When at the apex of the dip/rise, the gap on the dip side is 1/4" and the rise side up to 3/4". Don't know how we missed this. It seems to me I saw a video here of someones platter turning and that looked out of kilter like ours. Maybe it was a Norma post. In any event, to this point, this has not seemed to create any havoc with the pizza's in terms of more browning on one side or the other. I've informed Blackstone about this.