Well i found out today that s3 tubs are put together a lot stronger than s2a tubs. They use rivets in places where s2a just had spot welds. Especially where the front section of the tub joins the floor and where the tool box sections are joined to the front. Probably got something to do with where the inertia reel seatbelts are mounted. Very strong and hard to break apart. In the end i had to use an angle grinder to cut the section apart so i could put it in the trailer for the scrappy one day. The rivets that hold the ends of the galv stiffener plates under the tub were the same material. Very hard to even cut off with the cold chisel. I ended up grinding them off too. When i pulled my s2a tub apart i just gave it a few hits with the hammer and it fell to bits. They were just aluminium rivets. The s3 rivets were steel. Anyway its done. Just got a cab chassis now. More to pull apart yet. Gonna ring around the scrappies and get the best price for the clean alloy. Hope i get a few hundred$$.
Cheers Rod

