Thats no Moon, Thats a space station!
Sounds like your having fun lol,
I managed to undo a 17mm allen key bolt using and old 17mm wheel nut that fitted in the hole with enough space to fit a ring spanner over it and undo it that way.
Also if your going to all the effort to do that nice work you could have a go at the oil pick up piper if its not been done on your car yet. I did mine at home on axle stands and it wasnt that hard and well worth it considering how much it costs if it goes wrong.
Audi S3 8L BAM 225 2002 - Ming Blue : Silver Heated Leather, Armrest, RNS-E - Bose, Alloy Mirrors, 18" RSTT`s, Sunroof, Cruise, AutoDim Mirror & Usual S3 Extras.
Mods : Badger 5 Stg 2 Custom Map, FMIC, 3" DP & 200 Cell Cat, 007P, Jetex Filter & 80mm TIP & Heatshield, Complete LED Kit, Gen VW Aero Wipers, Full Powerflex Kit, R32 RARB, AP Shocks & Springs, 15mm Front & 20mm Rear Spacers, BB Uprated Actuator, N249 Delete & Catch Can, AP TVR 4Pot Brakes & DS2500`s, Sachs Carbon/Kevlar Clutch