hey extract brothas. can someone critique my tek and tell me why my yields are so low? open blasting trim to make crude for distillate, but only getting 3% yield. running two 90g stainless columns with dewaxing sleeves side by side packing the columns with a wooden dowel, not so tight that gas comes back up. I was running the material straight from the freezer after a 1 hour dewax with denatured alcohol, but my distillate guy said I didn't need to do any of that. my yields have been the same regardless, about 15g for every 448g ran. when I unpack my column, it looks like there's still a lot of keif on my dry material, like the butane didn't touch it all. can anyone help me increase my yields to what they should be? thanks guys p.s. does anyone remember what graywolf said on packing columns? I remember seeing some formula for the column pressure but I can't seem to find it.