Well i got the boot floor out it wasnt easy and you have to be very careful cutting along inside where the door shuts, as the fuel tank is about half an inch under the floor !, the rear supprt was shot so will be replaced i used a long sharp cold chisel to cut through the spot welds as i bent the floor up out of the way the other supports are ok so will be cleaned up and rust treated and painted.
I have also started to cut the cills completely of with a recip saw and am going to replace them with a 60mm x 120mm x3mm thick box section which is pretty heavy so should double up as rock sliders, these are also tricky to remove as you have to leave the body mounts in place if they havent rotted out, but cutting along under the floor is pretty easy going, remembering to hold up the floor when cutting i used a couple of jacks with 4x2 under the floor for support , once the cutting is done i will clean the metal to enable me to get a good weld to the floor, ill let you know how i get on.