Dear List Members :
I would like to thank every one for your response about this topic, I got a very generous amount of suggestions about the possible causes and solutions. let me tell you ,they went from humors to others more sincere pointing to unsuspected little things,base on individual experiences. I collected plenty of inspection points to check...... I'm glad to learn about those little tricks, but the best part is to be able to share this headaques with the CR members .
Let's lid the " Campagnolo oven " and have a very special Thanksgiving