Looking at your setup it seems that the full one-way diff is your biggest problem, this is almost certainly what is causing the car to loop around.
If it is the slippy bits where the car spins, try running with full-time 4wd and no roll bars. If it is the grippy bits, increase roll stiffness at the front to stop it hooking in.
I ran a Lazer a couple of times at Teesside, and although I didn't set the world alight (far from it), I found that the car was pretty driveable with the kit setup with the following changes.
Front: Inner hole on wishbone, #500 oil, camber link in outer bulkhead hole
Rear: Outer hole on wishbone, #350 oil, camber link in outer bulkhead hole
Drive: Diffs front and rear, centre one-way
Cells: Rearward.
Ride height: Driveshafts level
This was on worn yellow minispikes.
I don't know if Martin Illsley is seen at Teeside much these days but if you see him driving a Lazer then that is probably my old car and probably still has my setup on it, I'm sure he wouldn't mind if you took a look.
Dave A.
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