Perhaps the MSG90 case is like the wood case I had for the G3SG1. At the top of the bottom half of the case there were places where the plastic
cleaning rod could be attached length wise and it would therefore not be necessary to coil it up. Will see if I can find a pic. If I do I will post it.
Found one with the rod in place but looked at the pic of the MSG90 case and it would appear that such is not the case unless its below the foam
on the side of the case.