How would I go about doing this for ladders?

[N64Mario]

Say this for example, a custom static platform engine is produced featuring reverse gravity.

Player:
- Flag 30 Off - Gravity Normal, Player right side up.
- Flag 30 On - Gravity Reversed, Player upside down.

There are multiple ladders on the play field.
Each of these ladders have its own length in height.
All individual ladders have a top detector for the player to stand on the top of these ladders.

If players flag 30 is off, the top of the ladder detectors remain at the top.
If players flag 30 is on, the top of the ladder detectors must be moved down to the bottom of the ladders on which they reside on.
If players flag 30 is turned off from being on, the ladder detectors must move up to the top of the ladders again.

How would I go about doing this? Would I use a fast loop to make the ladder top detectors fall a certain distance until they reach the bottom/top of the individual ladders?

[DT]

Could you set the movement type of the ladder detector to path with a speed of 250. Then simply adjust the movement Reverse when the flag 30 set to on or off?