Just went outside and had a look inside my kalos.... Should of done this before.... I dont even hardly need to build anything for the back. I have a rear strut bar from u.r.
the points at which the seatbelts are bolted up to the pillars at the bottom near the back of the seats subframe is a bolt. And its directly opposite another one on the other side obviously... As they are for the seatbelts and the same applies to the highest bolt for the seat belts again at the top of the pillars, which is just slighlty above my seats, so would still allow my seats to go all the way back if something was attatched side to side and still clear it nicely.
So for this i've decided im going to just do it easy but pay that bit more and buy another 2 rear struts and hook them up at those 2 points and fab the rest...
As the rear strut is adjustable itl be simply a matter of a few twists for perfection..
Then for some extra strength a bar from the bottom seat belt point to the strut which bolts up to where the back of the seats catch bit is. And then one from the top again to the back of the seats, and do this on both sides.
then a bar from the top to the bottom seat belt points, so a mini cage at the back basically...
Summary:
Lower seat belt points (passenger side to drivers side) u.r rear strut
Upper seat belt mounting point ( passeneger side to drivers side) u.r rear strut
Passenger side l.s.b.p to passenger side u.s.b.p (custom made)
passenger side l.s.b.p to passenger side rear strut mounting point (custom made)
passenger side u.s.b.p to passenger side rear strut mounting point (custom made)
Drivers side l.s.b.p to Drivers side u.s.b.p (custom made)
Drivers side l.s.b.p to Drivers side rear strut mounting point (custom made)
Drivers side u.s.b.p to Drivers side rear strut mounting point (custom made)