router is best IMO. you can always rent one. a dremel will work nicely with the slot cutter or its own router attachment. i used that and only problem was the bit was too big so i had to hot glue the molding in. its quite a pain in the ass for such a small thing as t molding but nothing major. as always expect to spend more time on it than u planned. make sure you go slow and CHECK THE BIT FOR TIGHTNESS OFTEN. i had something loosen and it almost caused a problem.