It seems there might be a bit of confusion with the term "diminishing rig," as it's not a standard term in the bass fishing community. In the context of bass fishing, we often discuss rigs like the Carolina rig, Ned rig, and Alabama rig (A-Rig), each having specific characteristics and applications for different fishing conditions.
If you're referring to a specific rigging technique that reduces in size or effectiveness over time, or perhaps a rig that is designed to be less noticeable to fish, this isn't a standard term I'm familiar with. Could you provide more details or clarify what you mean by a "diminishing rig"? This would help me give you the most accurate and helpful information.