Thanks Rob. My aim is to give life to older parts. The cages give a new life to a derailleur which is pretty limited in cog size. Not to mention if you want to stay full NR/SR but want a wider freewheel your options extremely limited for derailleur choices for staying Campy. Not to mention once you find a Rally derailleur their quite expensive and all you really want are just the cages.

The same goes for the crank sets with 50.4 BCD. They offer a really low q factor and are really nice crank arms but ring selection is pretty limited. This just really opens the door and gives new life to these cranks. I'm thinking of Renuovo Components for a name.