I don't think most care if you even mention trans or prelim in your statement. They know full well why you are doing it. Instead of including some bs paragraph at the end that they can read right over, my PS was the exact same on ERAS as SF. One trans program in NYC even asked us at the interview to let them know if we would like them to include us in consideration for the prelim positions if we had previously only applied to the trans program. It's not like ophtho where they want to fully assess your love/interest for their field. You answered that question when you didn't go into medicine. But if it makes you feel better include the extra few sentences, but instead of worrying about that, just be normal in your interview. I got letters from several very competitive trans programs after the interviews and I assure you it wasn't because of my numbers (which is probably why I did not get interviews at the most competitive ophtho spots).