I have an '82 Bruce Gordon framed 10-speed with a Campy Super Record crank and Suntour Perfect freewheel, and want lower gears. I've read about the Peter White conversion kit for adding a third chainring to this crank. Does anyone here have experience with it? I have a Suntour Cyclone GT rear derailleur to use, and the Campy Nuovo Record front derailleur should work too I think. Are there any alternatives to the PW system? Am I committing a sin by considering this?