Is it true my old Campag Mirage 9 brake lever shifters will work with Shimano 9 if I slightly extend gear cable route by linking it around end of derailleur near eyelet bolt? Not in a massive hurry to ditch Dura Ace frame mounted gear levers ….Chainset could be next to go …..Thoughts /suggestions ? Like ,I reckon ,why change super functional Sora callipers for old rusty 80s/90s ones that don’t work as well ….? But I could be tempted by a nice late 90s/early 00s Shimano gruppo