I was also surprised at the relative lack of response to the
NPRM when it was first issued last year...

I'm a bit surprised as well. I rather wonder if the wording of the
thing might have something to do with it: "Replace the spar spigots?
How hard can that be. I'll order them, they'll come in a box. I'll
have my A&P unscrew the old ones, screw in the new ones, and be on my
way!"

In actuality, if the 102 is anything like the 103, replacing the
spigots is fairly major surgery requiring special tools and
techniques. It involves cutting away some relatively massive chunks of
fiberglass at the end of the spar stub and digging out the steel pin
and its attachment to the plywood shear web reinforcement. Then you
can replace that portion of shear web, use a special fixture to locate
and install the new steel pin and its mounting flange, and apply about
8 layers of bias fiberglass over the whole spar end.

Thanks, Bob K.