??
incorrect.
my personally setup for my r33 which was drifted on a regular had 6-7degress of castors, noted it was maybe alittle too much and next wheel alignment we were going to drop it down to 4-5degress But i would never run ZERO castors. Also having a chat to alot of other drifters at the meets they were running castor upwards of 4 degrees.
My 2cent on cheap coilovers, For the money you pay $1000-$1500 they do a fairly well rounded job, they are nothing special and i found my damper adjustment really didn't change anything at all but i was running 1/2nd gen d2 coilovers with huge spring rates (15/17kg if i remember right) i daily the car for 2-3 years.
I now run TEIN Type RS (10/10kg) cost upwards of 5k (and are not an off the shelf product for r33 anymore have to be special order), and the cars feels like its on rails and does the job i want it to do perfectly but thats what you get when you pay big dollars