Can someone please explain in detail how the height adjustment of the Apex'i N1 works?

I read that it is done by "loosen the very bottom collar, and rotate the part where it connects to the LCA".

I guess with very bottom collar this collar is meant?



If i rotate it counter-clockwise (down) the ride will be lower and clockwise (up) lower?

My manual is in japanese but if i'm not wrong it says on the front dampers 37mm thread is left and on the rears 47mm.

Is there a way to adjust the height without the spanner wrench? I have a 80-90mm one that fits the bigger middle collar, but not the lower collar. I guess the Apexi wrench is like 50-60mm?

How low is the N1 "stock". All the way up? All the way down?

Does zero preload means that i assemble the dampers/springs/pillow mounts by hand and it is a tight fit but the springs are not compressed/loaded at all?