haha totally agree, id tried a 1/4inc drive uj fitting, flexy drive and still couldnt get to it, i considered removing the alternator but luckly didnt have to go that far, a bit of manipulating and a 10mm socket mated in somewhat to a 6mm allen key to a ring spanner did the job,
you make sure the stat was in the right way

, i doubted myself first time!
edit, it was volksbits, god knows where i got vag parts from
as for putting the tube back, warm it up first just to be safe, and yeah its a push fit, just go steady with it, they become brittle over time, a new ones pretty sturdy..