NEW Guide tongue support. The revision is to conform to the shape/profile of the integral tongue on R-Geo Chassis and not interfere with guide movement. It should also be more universal with all retro chassis. Also has relief for tuning fork tubes, if you lean that way. Also I had a larger order done to be able to offer at a lower price. Still 19 gauge steel. $3.75 each. Will be packed 10/card for Distribution or track orders.