I have one science professor who only writes LORs for people that score an A+ in his upper div molec bio course. I am short one science letter of writer, but I do not want it to be generic. I have had 1-2 interactions, in a Zoom lecture of about 150-175 students, at most given that the term was online. However, I plan on scheduling a Zoom meeting to talk about our interests throughout the summer and next school year. Would this work? My other letter writers will have known me for 2-3+ years and this professor will be the only one who has known me for less than a year. Is that an issue?