Head-cannons about your army?

I use the twisted helix sub faction a lot so I head cannon that my placed cover is genetically engineered super plants that were pre seeded to grow where I want or that tanks and valkyries are filled with nerves, muscles and eyeballs to see outside connected to the pilots who are actually like a part of their vehicles and can’t leave without extensive and expensive surgery. I also use the genetic engineering angle that comes from that to let me head cannon that most of my troops are grown clones to get around the more uncomfortable parts of genestealer cult lore.