Well, if you do the math, if you do two witnesses, that's 20 minutes of evidence. One round of questions takes us to about 34 minutes. Our meetings are two hours. Assuming you want to stick to two hours and you want to have some time for drafting instructions, we probably don't have any more time than to accommodate three witnesses. That would be my suggestion.
On February 19th, 2020. See this statement in context.