I currently have a an IRO angus 59 built up and am realizing it is too big. I''m looking to purchase and Mark V pro 56. I talked to a shop to see what the labor would be to swap everything over to the mark v & want to charge $120. It seams to me that the most difficult thing to swap over would be the cranks and bottom bracket but I don't have the tools for that? I'm aware I have to get a new stem and headset for the mark V. I thought about joining the freewheel on hayes here in SF to make it all happen w/ their guidance. Does anyone have any insight?