Rough timings from reddit: D1 4h 16m (Milngavie -> Drymen 13.4miles) D2 6h (to Rowardennan 15.7 miles) D3 6h 16m (to Inverarnan 14.3 miles) D4 7h 24m (to Bridge of Orchy 20.7 miles) D5 4h 34m (to Kingshouse 13.2 miles) D6 5h 10m (to past Kinlocheven 13.5 miles) D7 4h 1m (to Fort William 10.1 miles)