how come none of this was mentioned while this radio was at auction on ebay?

I replaced the broken switches with the SPST and SPDT switches as the mod
says, and I only get the standard 40 channels. With the switches in the
other positions, I don't get the standard channels according to the mod
commonly found on the net. I'll replace them with the same switches that
were in there (apparently two DPDT switches) and see what happens. Once
that's done, I'll have to tackle the problem of why there's no audio with
two different mic's. I'd still like to know what mod the tech went by, as is
appears pushing some of the front buttons affect the frequency, but I
suppose that might be an after effect of not having the right switches.

Once the switches are replaced and I have the results, I'll post it here for
information.