The main strut that goes behind the seats is a copy of the Cusco cage, im going to contour it better to follow the lines of the supra body to give a bit more space but not enough to loose its strenght. The Do-luckcage is made from an oval tube allowing more space between the body and the seats but it does not have the strength that this cage will.
I have after market OMP race seats in mine with wide shoulder posts fitted it does make it hard to fully recline the seat but gives you enough room to drive for the larger person, you will have this problem no matter what the cage as theres little room between the seat an the cars body, I think this is why Do-luck has chosen the oval tube to allow for this, but like I say this to me looks purely show purpose.