Just get a good, old-fashioned L-bend allen wrench and a hack saw. Cut 2-3 cm from the handle of the allen wrench and clean it up on the bench grinder. Now, go get your impact and a 10mm impact socket. Put your newly made adaptor into one of the socket-head bolts, put the 10mm impact socket (still attached to impact wrench) onto the other end of the adaptor, crank up the compressor, put the impact in reverse, pull the trigger, remove bolt. Repeat as necessary.

Jay.

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On the road, currently:
'83 300D (German spec.) 168k mi. - - Wolfgang (tucked snugly away for the winter!)
'87 300D 375k mi. - finally went over to "The Dark Side"
'87 300TD 225k mi.
Cannondale 66cm CAAD5 w/Campy/Jamis Aurora
Hujsak Custom Fixie/Landshark Track Shark Custom/Ahearne Custom 29'er