I am getting stripes in the sky after developing 8x10 KODAK 160Vc colour plates with the TETENAL COLORTEC C-41 kit and a CPA-2 JOBO rotary processor with a 3005 drum. I am doing exactly as the instruction say: 38º temperature, position P in the processor (50 r.p.m.), 3´15´´ development time. A quicker speed (75 r.p.m) would perhaps solve this problem? What other factor can cause this uneven development?