I shadowed a surgeon in Europe 8 hours a day for 3 weeks (~120 hours; weekdays only). Sometimes we even ate lunch together, so I think he knows me well by now. Should I ask him for a LOR? Because some people in the forum say "don't get a LOR from who you shadowed for a short period of time". I mentioned him about the LOR in the last couple days and he said he would love to write one.