I was always battling the setup on the car, since I just build things instead of buying things that are pre engineerined I usually spend the same or more money and about 50x the time.. But that is part of the fun for me..
I did a 3 link floater. I always felt that the rear needed a bit more roll stiffness (i kept adding spring rate) I was always up in the air about doing a rear sway bar, it kept getting better, the rear of the car always felt really solid and stuck like glue.
This car initially took me about 6 years or so to get on track. I started it when I was 17. Few people laughed at me when I said I was building a "race" car. I went through 3 rear suspensions before I even drove the car... I learned quite a bit in how to think a project through tho. Also, how to fabricate better and make things cleaner.. SO I hope this one doesnt take me forever!