I just loaded Beersmith for my first AG batch. In helping me hit my target mash temps I have some confusion. Many people tell me to pre-heat my tun with some boiling water. I have configured my equipment in Beersmith and when I create the mash profile, it gives me the option to adjust temp for equipment. By checking that, my strike water goes up from 166 to 170. I would assume that if I pre-heat my tun, I should not adjust temps for equipment, otherwise I will end up too hot.
Seems easier to forget about pre-heating and just use the higher strike water temp.