Massive prints (More than a kilo) in Help, Tips & Tricks Posted December 11, 2017 First thing I would do is insert a.8 mm nozzle and change layer height to .35 mm. That will improve both print speed and IMO your chances of success greatly. Also fewer layers can strengthen the part in many cases. There may be more post processing required if you want a smooth exterior, but we're talking maybe an hour extra, whereas you'd be saving days worth of print time. After I started buying 1kg spools I never went back to anything smaller because I got tired of collecting spool cores with unused ends. 1kg+ spools should help you complete large builds with minimal filament changes required. Good luck on your speaker housings!