My Fun 130i (E87 LCI Motorsport Auto)

This one's not a project so it lands in the showroom. Although I do have some small projects on the way. For those that don't know I've been casually looking for a 130i for a few months, I say casually but I have put a fair bit of time and effort into checking around 7 out. Including putting 5 up on stands and taking the under-cover off. None were ideal, all were filthy underneath, only a couple were briefly tempting. I was disillusioned tbh. I was one of the first people to view this

So, coolant hose arrived, later than expected but I haven't had a lot of time recently so no real loss, I wasn't expecting Saturday delivery. Does anyone know how much (more) coolant I'm liable to lose when I remove the existing one? To my surprise it's still dripping nearly 4 weeks after it started. I was going to jack up the left side of the car only when replacing it in the hope of making that hose the highest part of the system, but am unsure if that's a futile exercise?