Well it goes 'clicky clicky'. Anyhow its a few different things that come together at the same time. Yesterday it was one part while today its another. Swaps between side muscle n lower back. Missing a part. Basicky you can 'roll' parts around in the tailboneish area. It can click into or out of place. Its not swolen or anthing but you can move 'fat' so i'm guessing arround it to. As i have a few layers now! Sitting is mixed results depending on hardness of surface. But lyeing down helps when pain strikes. If it was truly my back i would not be able to curl which i can do without trouble. Its bending the other way which effects standing n walking. It could be a hip joint issue as for one day i was completely standing slanted everytime. Having favoured to put weight on right side. But hey bright side. Tyranids coming along fine. Now with tail.... almost. And i've reworked some Depthcharge bits. I should look younger now. I've had lots of beauty sleep. Still haven't watched fergully.