Originally Posted by utkinpol

I tried my new CS sporter seat with cg-lock last week. it holds hips perfectly in place from what I can tell, very similar to feel I had in my friend`s car with 5 point harness, upper body of course is not fixed as well but seat does more or less adequate job to limit upper body movement so for now I will simply keep using cg-lock for a while.

from cs sportster seat construction I can say no way in hell you can do submarining after lower belt is tightened - there is no space left there to slip under belt and I think 4 point would work fine. but it looks it is too much pain to go over those multiple discussions about regulations and overall feel of this new seat with cg-lock on standard 3point harness is very good, it really fixes lower part of the body perfectly still in the bucket and that was a major issue with old seats.