>>96350272
>>96351343
In this comment, Mentzer comments that at some point he stopped playtesting at TSR because he felt he didn't need to. The timeline he provides, his last RPGA adventures, matches the claim in the osrg guide: His fourth and last published RPGA module, R4 Doc's Island, was published in 1983, while the Companion was released in 1984. So by the time he was writing the Companion, Mentzer had already stopped playtesting because he felt he didn't need to.