What? Twelve hours? Are you kidding? I have Ender 3, the very first one, which comes with bowden. I just installed BeMeGe (a printable BMG clone) and a simple direct extruder mod. Which is actually a very short bowden. It is 10cm length from gears to nozzle tip. Which is quite large for DD. Changed firmware. And 8x8 tile is printed under 4 hours(3:30 or something like that) and Bambu 'superduper' printer prints it in 2:30 as they say on multiboard site. Stock belts and motors have no trouble with 3000 mm/s2 accelerations and 150 mm/s speeds. I flatten the bed with hands, and what left I fill with sticky aluminum foil and checked with a metal ruler and a flashlight. So I do not use any probe to check bed level. I use bed tramming feature which recent Marlin firmware have, and a thin piece of paper, but I do this once in a couple of months, I usually do not change anything. And I use magnetic PEI, which is really convenient. And your bed is very slow in heating. I think this is because of that glass plate, and I bet you did not stick insulation from the bottom. My Ender 3 is ready to print in 2 minutes up to 255/70 which I use for PETG. (actually copied settings from Bambu slicer) I understand now, why people buy Bambu printers. What you showed int the video is a real pain. = ) And why do you print them in stack? I would understand if your printer would print one tile in 30 minutes. But for me, even one tile every 3-4 hour is not a big deal, and if I set it for a night it is only one tile yes, but not a big trouble. Also I would recommend add auto turn off mod too. It was actually the very first one which I installed. The printer can turn it self off by pressing a switch with printbed after the print. You are a really patient if you use this printer just like in the old days = )
