You got lucky with that '76 HD-28. I have a '77 D-19 that was just a total piece of crap until it spent a month with a really good independant luther who corrected a number of factory flaws including the bridge being installed in the wrong place (making it impossible to stay in tune up the neck). I love it now, but I sure would have liked to have had some of whatever they were smoking the day they put that one together.