New Gruppo on older bikes

Agreed but it illustrates another murphie's law in that whichever great gruppo part you pass on due the rarity of the other bits, those other rare bits will magically appear shortly afterwards. The converse of this is also the case but much more expensive.

murphies law will screw you one way or another anyway...so its not worth worrying about. You won't get a flat for a month then you'll get 3 in a week.