please clarify Do you want to adjust the pressure loading of the plate and blanket cylinder bearer rings? I would have thought this should only be done by an experienced Heidelberg tech as doing this incorrectly could cause some very expensive damage to the cylinder bearers. If on the other hand you wish to adjust the 'Squeeze' between the plate and blanket then you need to adjust your press packings to obtain the best printing pressure that will transfer ink efficiently and give you the best registration.