I have been waiting for my 54/1706 motor to be delivered for quite a while. I don't want to to assemble my rocket until I have parts in hand to ensure I have the MMT positioned correctly in the body tube. I've decided to just 3D print a spacer that is the same thickness as the flanged section of the aft closure that engages with the Aeropack retainer. The drawings on the Aerotech website show that the flange thickness is 0.375". Would someone with an Aerotech 54mm aft closure confirm this is correct? Thanks in advance.