rear shock stuck

The rubbers freeze on the studs...get some WD40 in there and start moving it. Before re-fitting shocks i always smear a small amount of vasoline on the rubbers,not only helps getting them on but REALLY helps getting them off

Got it, shock if free, I believe that it was stuck as described above, thanks
 
in picking it up, it seems the strongest point will be the square box with the 4 nuts, seems the round housing would be too weak, do you agree?

No it’s tubular steel that’s ****s retarded strong.