The only problem is that some of the plastic chicken-head knobs are kind of loose and tend to want to slide off of their pot shaft when trying to make adjustments to the amp's sound.
They aren't regular chicken-head knobs either, they need to be able to reach back far enough to slip over the short shafts that are recessed behind the front control panel.
Any ideas where a guy could get these? Does Yamaha still sell them? I haven't had any luck so far in finding these things, dang!