I'm glad you enjoyed it.
Out of curiosity, what errors did you notice? As I recall, the ones I had jotted down were as follows:
1) I'd referred to Kazgoroth (the Darkwalker from the Moonshae Trilogy) where I meant St. Kargoth.
2) Given how Mystara was incorporated into 2E, my idea of eschewing references to Orcus in Basic D&D due to prohibition in the
D&D Rules Cyclopedia on intermingling gods and Immortals seems incorrect now (e.g. the appendix from
Warriors of Heaven that lists various Immortals as AD&D deities).
3) H1-4 are ignored totally, which was a major oversight.