The Ready State Virtual Mobility Coach is like having a virtual Kelly Starrett in your pocket.
The tightness is just under my pelvis crest beside my spine, i have rolled and stretches and it still persists. And yes, ive stretched hips, hammies and made sure all is well. The tightness is from an injury a while ago that i have mostly gotten rid of, except for this tightness.
Have you looked upstream?
this 3 part series
Jill Miller Fixes Your T-Spine and Crappy Breathing Mechanics
Jill Miller Smashes Your Guts! (and psoas, and tacked down viscera, and matted down abdominals…) Part 2
Jill Miller Diaphragm Evolution Part 3: Eccentric Loading
Many times low back or thoracic problems are caused by bad diaphragm mechanics.
Just found this site, great stuff! As a chiro get x-rays to assess the lower lumbar spine. If you have spinal arthritis then the irritated disc/nerves may be making your muscle hypertonic. Foam roll the poo out of it.