And I absolutely agree with the "good stewadship" part. But prehaps gently following up and advising that prehaps a 54mm might not be the best HPR entry motor size...or something like that...
We dont want to scare people off! This is a great hobby!
I complete agree with this, and definitely don't want to scare someone off. I guess my thinking is, if we provide the answer while also advising them to reconsider 54mm, etc, I seriously doubt they will actually heed the advice since they got the answer they're looking for. If we refrained from providing the answer outright, it might incentivize someone to look into it more and do their own research, learning other things in the process.
I maintain that asking this level of question for an HPR build should raise some eyebrows. Yes, we all started from scratch and learned, but I think most of us do it methodically beginning with LPR, where mistakes and learning experiences generally are more forgiving than HPR.
@curtthedirt Check out Apogee Rockets if you haven't already, for lots of informational content on all aspects of rocketry.