Ok, I've found out why the suspension arms flop around.... The only thing that stops them is this little plastic nipple that's hollowed out for the securing screw. So in short it's very fragile and bends easily, one of them was extreemly floppy and fell apart when I removed the screw.

so my solution will be to run m3 threaded rod from one side to the other side. And a sleeve where the arm pivots from and secure them with a nut. Because of the gearbox I cant do this with the end arms but I plan to use threaded rod that goes from the arm to the metal part of the gearbox...

next... looking at the springs they are running about 130deg preload. And looking at the nipple u can see the springs locating hole is in the bottom left, if drill a hole in the bottom right it will reduce that to about 90deg preload