A miter bar assembly (100), including: a top member (102) having: a top member opening (110) configured to permit a bottom member fastener (122) to pass through the top member; and a top member fastener feature (140) configured to immovably fix the top member directly to a panel; and a bottom member (104) positioned under the top member and having: a bottom member fastener feature (120) configured cooperate with the bottom member fastener and the top member opening to enable the bottom member to move laterally relative to the top member and to selectively immovably fix the bottom member to the top member. At least one of: a magnetic force urges the bottom member and the top member laterally apart; and relative longitudinal movement between the bottom member and the top member adjusts a lateral position of the bottom member relative to the top member.