From the other side of the consultation, briefly. Take it one variable at a time. Almost every unanswerable question in these threads is unanswerable because three things changed in the same fortnight, and no amount of subsequent argument can untangle them after the fact.
Adding the numbers, since they settle part of this. Keep the original post as written when you update it, and add the correction underneath. An edited-away mistake is invisible to the next person who makes it.
One thing that is still open after lucas_SP_BR’s answer:
What actually distinguishes 503A from 503B, in terms of what each may make and from what starting material?
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Browse GL BiochemDr.RaviCardio said:Keep the original post as written when you update it, and add the correction underneath.
This is where I part company with the consensus forming above. Pushing back on the anecdote-stacking. Twenty people reporting the same thing is twenty samples from the same self-selected pool, not twenty independent confirmations.