Reentering cycling again and looking to upgrade my areo levers on my Paramount to STI. The drivetrain is RX100 7 spd. Ive seen some used RX100 STI levers out there on E-Bay but these could have 18 years of wear on them unless they are listed as new. Currently have to kids attending colledge so a whole new drivetrain is out of the question. Will 7,8,9 or 10 105 or Ultegra work? Thank for any input.