I have an old Flashforge Dual Extruder (The one made out of laser-cut wood, a Makerbot clone) that needed minor mechanical repairs, which I fixed. Now, I have a few questions: 1) The firmware is version 1.0. What would be the best/most stable firmware for this? Should I use the Flashforge firmware? Sailfish? Something else? 2) Any recommended upgrades? Glass bed? BuildTak? Anything else? Thanks!