I've just set up my wife's new Lust Advanced 2 with a few parts from her old bike. One of them being her dropper post. As the bike has internal routing, there aren't any external cable guides for the dropper post cable. Is there anyway that I can route the cable other than using zip ties on the top tube? If she got a reverb stealth, would she need to get a new rubber grommet to allow for the dropper and shifter cable? Looks to only allow for one cable at the moment.