Khaki Nitro Nut
Great step-by-step instructions, CAT3!
Ah, using the 2"x6" on long end to prop the headliner down, definitely provides enough room to avoid self-damage.Those instructions are exactly what I had to do to swap mine.
You forgot the part about skinned knuckles and wiping up the blood. I ended up finding an assistant with smaller hands than mine - only way it worked for me.
i used the same method as you, using the bits of wood, worked great, but still found i very hard getting to the small bolt.I replaced my antenna base and antenna following the above instructions and it took around an hour, probably would've been longer if my assistant was not as smart as he is. I'm lucky to have a good neighbor.
Anyway we used two 2x2's about a foot long as a wedge on both sides of the base, and having a ratcheting flex head 10mm wrench helped tremendous also. The biggest challenge we found was trying to remove the old base from the roof. It didn't just lift right off. At least not how we could figure out. had to break off one of the plastic retainers, bend the alignment pin, and then it came off.
Now I wish I would've replaced it with one of those shark fin type of antennas.