I'm not sure if this will help, because I have never tried to export CR templates from RockSim 8, but perhaps you need to make sure that the ID of the ring is slightly larger than the OD of the tube that will fit in it. For instance, if you define the BT-50's OD as 0.976", then make the ID of the CR-5080 ring something like 0.980" (or whatever), so that RockSim understands that the hole in the ring will be large enough for the BT-50 to pass through it. I don't know, but maybe if you define both diameters - the ID of the ring and the OD if the tube it is meant to center - at exactly the same size, such as 0.976", things get confusing. I don't know if this will help, but it might.

MarkII

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SAM # 0011