Dear all We have a Heidelberg SM 74 with perfector after U2, model 1995, 150'000'000 impressions. Colour sequence is B C M Y. The 4 registers at the lead edge are perfect, but at the tail edge they shrink to the inside (right and left). If I consider that the black is OK, then I can see the cyan shrinks for less than 0.5 mm, the magenta and yellow shrink for more than 1 mm. I am mechanical, and I started to adjust the bearers between blanket cylinders and impression cylinders to the standard, after tomorrow I will adjust the bearer of blanket cylinders to plate cylinders. But I am not sure shall the grippers and cam followers make such a problem? And shall anybody has recommendations that can help?