Swapped out the bed for a 12 inch x 13 inch x .25 inch MIC6 plate. Threaded rods changed to 2mm thread single start. Added another z brace to prevent bed sag. All carriages switched to Re-D-Bot three wheel versions except for hotend carriage. Print head is an E3D Titan (Triangle labs clone) + E3d v6 genuine. Silicone heatpad upgraded to 120v 700w switched using SSRs.
Extended build log and documentation available here. Makes don't allow posting html or zip files with them for some reason.