I do at least a 3 hour fast, whether going to TLM or NO. I usually go to late afternoon or evening Masses, and I never go to a Mass that is very early in the morning. If I go to TLM, it is at noon on Sunday. If I go to NO, it is either at 4 pm on Sat. or 10 am on Sun. Mass during the week that I go to is only in the evening.