Did an iteration of the chassis incorporating the gyro-radii calculations tom provided. Also made the channel for the superconducting cable thicker so I have more room to maneuver the cable, and allow for a greater volume of LN2.
Ok the minimum physcial coil spacing for a dodec (based on truncated icosahedron) has to be at least [(SQRT(3)*SQRT(2) )/4]*R, (about 0.61R) where R= coil radius + coil container thickness.
And new lids to match:
In case you were wondering, this is a chassis that would accomodate enough SC cable to match the B fields on WB6: