Hi Folks, I am installing new rear air bags which came with 4 new o-rings. one small goes on top, two medium around top and a much larger one that fits on the base of the solenoid. I have not been able to compress them far enough to turn them in place to lock. I tried a small clamp to compress but that is problematic because the clamp keeps slipping off...is there a special tool? I measured the old and new depths of the cylinder that the solenoid goes into and there appears no difference. Should they be that difficult to compress far enough in to allow the rotation to lock them in?? Any previous experience with removal/installation of the rear bag olenoids would be greatly appreciated! Thanks!