okay so i was thinking about getting koni yellows to go with my ebay coilovers. well basically i am just going to use the springs without the threaded perch. I use to run it with stock shocks at a higher ride height and it was pretty comfortable and i don't mind it at all untill i decided to slam the car and run it with the perch. Now i am bouncing all over the place. I even know the spring rates . F:450lbs R:350.

Question:
Since there is 3 position i can mount the spring holder thing on the koni, which one should i run it on? Will i need to cut my bumpstops? thanks.