Replacing springs is really easy, a matter of 5 minutes to do all of them, 1 screw on each and swap them over!.
Replacing roll bars I was thinking it was going to be awkward but again very simple, its a matter of taking out the 4 screws and a matter of twisting the bar in a downward corkscrew method under the chassis and it slides right out!

same to get it back in and refit the bearings in the correct place as you go along!
there is a nice option part to replace bars in a matter of seconds but after doing this change its just an expensive option thats not really required.
refit the bumper and job done!