Like the stem where it is , height-wise? add a spacer on top of the stem and the cap goes on top of it.

you press the headset down , into preload adjustment from the top thru the stack of spacers & the loose stem.

but the spacer-stem stack has to be higher than the steerer tube itself. so the cap does not bottom out on the steerer tube before the headset is in proper Preload.



Putting a QBP Problem Solvers' Locking Spacer on first , directly above the upper race. holds the adjustment and the fork wont fall out,

while you move the stack of spacers and stem over it .. Integrated headset was kept together that way..