I did verify with JTAC. Target was "hooked" with TMS up. HOF was 500 ft. (the default).
I tried again from lower altitude, 4500 ft., and got hit by an SA11 10 seconds out for my trouble.
I'm not sure about the exact location of my cluster pattern, I'm still trying to figure out how to get the TGP to work.
I guess I should do the tutorials again, but thanks for all the help.