My first duration test of the dual head setup, this print took +/- 10 hours and >400 tool head changes.Unfortunately the calibration was still a tiny bit of, but it's a nice clean print.(15mm retraction on tool change, +0.5mm compensation for leaking, layer 0.2, fill 15%)Here's my setup:https://www.youmagine.com/designs/dual-head-ultimaker2