I jacked and secured the chassis up far enough to get the wheels off, removed one wheel, then used the Disco bottle jack to spread the axle/chassis. Easy job, front and rear, springs almost fall out and +2" can be coaxed back in. Hardest part is undoing the front shock top or bottom bolts .. if you can, undo the bottom bolt so you can push the shock up into the turret so there's room for the spring to drop out/fit in.
Buy a new turret ring set before trying (if you can't undo the bottom) to remove the turret .. they are very likely to snap!
Rear is simple, remove wheel, undo top shock bolt, spread axle/chassis ...