Volks- thanks for telling me the 4 holes are for removing Tug's radio but I
don't think I'll try the freezer trick since no one has reported success.  No,
I'm not a robber- I know my code(!) & have reprogrammed it several times.  My
problem is getting the constant SAFe to change to 1000 so I can imput the
code.  I've left it turned on for several hours, pressed SCAN first, then
added AM/FM & vice-versa, pulled the fuse while pressing them, & many other
variations.  I'll bet it's a perfectly simple combination that I just haven't
tried.  (It's a '90- Heidleburg VI).

How unfair to be forced to go to a dealer or the manufacturer!!  Still open
for more ideas...

Pat & the Tugboat.