I found two issues when fitting the quick release harness from Meridian into my GTR.
1. The eyelet bolts are a different thread size to the seat mount bolts at the back of my front seat. The back left bolt is needed for the lower left strap.
2. I was told by a scruitineer that installing the shoulder straps into the seatbelt clasp mounting position on the rear seat is illegal. It puts the belt on a fairly steep angle, close to 45 degrees.
They say that in a front on accident, forces will move your body forward and cause the driver seat to crush down and inturn, severly compress your spine.
Therefore, they only allowed harnesses in cars where the rear straps were mounted onto the parcel shelf or onto the roll cage at an angle to the shoulders of no more than around 15 degrees.
I know plenty of track day organisers don't pull you up on this but it is worth noting. I will be rigging up a mounting plate in the parcel shelf for the rear eyelet bolts.