Free informative sketch of angles and suggested size for DIY fabrication of an adapter to move Divided utility seats aft approximately 3". Side attaching tabs are welded to adapter and seat frame to fit airframe. Tube size and material should match 4130 .049 wall welded seat frames.

It is the owners responsibility to insure any modification to an aircraft / aircraft seat complies with applicable FAA regulations and work is performed by authorized and appropriately rated persons.