First lot of questions:
1. How heavy are they (just out of interest) I am not sure of the rating but they are the solid jobbies
2. Ideally, but not necessarilly (See below)
3. Yes or with the circlip type height adjusttment. NOPE
4. Roll centre adjusters alter the suspension geomtery hence migrate the roll centre.
Answering the second lot of questions:
1. So you need more spring stiffness relative to sway bar stiffness. OK I HAVE 7.1 KG/MM FRONT 6.6 KG/MM REAR
2. Then big up the spring rates. Dampers will work within a range of springs - but you need to check.
3. I understand where you are coming from. I got the wrong colour springs & I needed to go buy some new handbags, damn it all. I would recommend a combination of Eibach springs & Bilstein shocks. Springs can be chucked at little cost if they are wrong & the shockers re-valved if necessary.
4. Yes. I have some spares somewhere + some drawings if you can get stuff fabbed.
5. Get some more -ve camber! Particularly at the front. GOT 5 AT THE MOMENT