When you reach the top of the elevator at the bottom of which you will perform the spawn point manipulation you will have a range of 0 to 25 micro frames (X Position Low Byte). The diagrams below will show you the required value of micro frames you must have in order to die at that red line location and still get spawned at the final check point. The further in the level you go the more likely you are to obtain this ideal spawn. Each time you pass a red line you are 3.8% more likely. The earlier you die the more time you save but the less likely that this will occur.

Level 3:

Level 4: