My flushes have all been different. In the 7 I have done so far, 3 were what I would call great. They all, for the most part followed Clark's method to the letter (I used pink GFJ or white when I could not find the pink GF). I tried more oil/gfj on a few of them, but it did not seem to make a difference for me.
I did start adding Black-Walnut tincture and Wormwood on number 5 and number 6 dumped a few flukes.
Grapefruit season is at a close here and organic fruit is almost impossible to find now and is $$$ if you do... I also used organic apple juice for the ES in 6 when I dumped the flukes.
Maybe I will have to break down and use lemons, there are still a few of them on the tree.