Sure. Issue is particularly with the name, "PD-64", which suggests Public Domain (it's far from!). It may well be unintended.
C64 PSUs are C64 killers, which is why I feel strongly there should be as little as possible in terms of barriers to getting a replacement.
Yes, it is far better than the alternative (no schematics), as at least we can learn how it works without reverse-engineering, as well as build our own legally (just not sell).
