I bought a used 9 speed Santana (2003 Team Alum) nicely set up with an Ouzo Pro fork and Sweet Sixteen wheels. (Our first tandem.........still waiting for good weather to give it a test ride) The seller sent me the old steel Santana fork and and the original bullet proof wheels as well when he sent the bike to me.
The "old" fork and wheels are really close to brand new from all appearances and beautifully made.
Question is whether it is advisable to hold onto these components as potential spares for the higher performance stuff he put on the bike. I dont think the Ouzo will fail unless I hit something. I can see some logic in holding onto the wheels in case I pretzel one of the Sweet Sixteens which look a lot more tender than the originals, though I have read the stuff that says they are stronger.
Do most of you guys hang on to such parts you have replaced?