gutting hope you tried the top nut first and didn't lose to much drinking time

tool you need always on ebay about a fiver or pop down your your local tire bay spin them off with a gun then
use a mole grips on a socket and a 7mm allen key down the middle to retighten to drive it to where your going to do the job
nice and slow do the job top nuts only 44 newton mts if i remember rigthly so tighten back up should be ok with the mole grips
bet would let you do the job in their car park for a couple of pounds cheaper than a hire car
Rob