I’m in a similar situation to Helene. I’ve worked hip-key roll-ups a little in the past, but have generally steered clear of c-shaping stuff due to an old lower back injury. Now, after several practice sessions focusing on the rollup and the melty star, I have quite a bit of pain on the side body where contact with the pole occurs (my back is actually fine, go figure). It may just be too much, too fast for my body. Anyway, I’ll back off for a bit and see if it resolves, but if not some alternatives would be great.