Can you elaborate, Nobnard? I was shocked at the difference ($3,099 for Ultegra equipped and $4,400 for Centaur equipped). I asked the sales manager to double check his sheet to make sure he was correct. He was looking at his MSRP sheet for each one and I saw it right there, he was right. I thought it made no sense why the price would be so much different. Are there different package levels of the build kits? Could it be a basice Ultegra group and a premier Centaur group? Is there such a thing? I will talk with him more about it, but I think I need more information/ammo to be able to know what I am talking about.