I am wondering if anyone has experience or can shed some light on the following situation. I have a bike with 7 speed friction, full Campy Nuovo Record group with a Sachs 7 speed freewheel. I want to move away from the friction but retain Campy. I have a set of early 90's Record 8 speed ergo shifters and I was wondering if I could get them to work in this setup by changing the rear derailleur to an 8 speed Campy indexing derailleur and setting the travel limits to the width of the 7 speed freewheel. The Sachs freewheel has the same 5 mm spacing that an 8 speed Campy cassette has. I am always in the smaller cogs on the Sachs and I am wondering if the limits can be set so that the extra shift is at the inside (large cog end) and the outer, smaller cogs shift consistent with the intended ergo shifter positions (final ergo shifter shift would be down to the smallest cog). Can the limits be set this way or must the extra shift be on the small cog end? Is this conversion possible and will it work cleanly? Would there be any compatibility issues? Thank you in advance for any feedback!!!