Guys, just did the notorious oil filter adapter o-ring replacement. This worked like a freakin' charm! First, the jeep tools du jour:
When the T60 torx bit is seated in the adapter bolt, it leaves enough room to get a wrench on there ( I used a 12mm closed end). the wrench is a cheapo that I cut/broke so I could get it in my breaker pipe.
I inserted the torx bit - wrench combo, then put the pipe on it, tilted out over the front axle and steering linkages, and broke the bolt free with only a wee coating of elbow grease.
It actually took me longer to cut and break the tip off of my 12mm wrench than it did to remove the oil filter adapter.
Hope this helps somebody!