The tornado was my first printer back when it first came out in 2017! The second z screw made a HUGE difference on my machine, same with adding braces to the z and switching to kilpper so I could run input shaping (no matter what though I was always limited by the heavy glass bed). I ended up buying the SK-GO because I tightened the bed leveling knob too much and shattered the bed lol.
The state of the FTC is so fucking sad.