C70 brake: conversion 15″ to 16″, length of brake hoses

Hello! After my 15″ brake discs (280mm) have already exceeded the end of the life, I plan to upgrade my C70 to the somewhat more stable 16″ system (302mm, front). Ordered for this: -> Volvo caliper holder for the larger disc -> 302mm brake discs Zimmermann punched (here you can be divided, some had probables with it, I’ll try it myself) -> new brake blocks (TRW or ATE, depending on what the dealer gets faster) I still have a few questions about the brake hoses: my Volvo dealer recommended me new hoses, since the saddles will now sit further out. Anyway, I wanted to change, because my Coupe should run for a few years. Unfortunately he could not tell me how much longer the hoses should be. Does anyone know of you the correct length? Am also the superior to build up steel flex lines (Goodridge or similar) because there is experience with it? Thanks, Michael