Jelquing - Which way for longest temporary flaccid gains

In this forum people are reporting that with jelquing you temporary gain a bigger flaccid and from time to time the temporary bigger size will stay longer and longer.
As a bigger flaccid is my main goal I have experimented with jelquing to see when my flaccid temporary gains will stay longest but I don’t quite get it as it is always different. Sometimes the gain holds on for 1 hours and sometimes only just some minutes.

When do you have the longest flaccid temporary gains after jelquing and how long does it stay this way?

1) long (3 sec) vs fast strokes (1sec)

2) 30-40% vs 80-90% erection jelq

3) less strokes (<150) vs more strokes (>150)

4) harder grip vs lighter grip