The C7 case is EXACTLY maximum carry-on size: 24" x 14" x 9".
Contents of the case:
In the top compartment,
an Astrotrac attached to the wedge,
a Stellarvue SVR70, and a Televue diagonal
From left to right: the battery pack, a red-dot finder, a red-light flashlight, the polar scope, a Benro HD-38 3-way head, and the handles for the Benro head.
A 'Ginsu' style knife did a wonderful job cutting the foam.
Once the case is zipped up, nothing rattles.