Despite fitting a larger Slot.It guide to my NSR corvette the front was just sliding out of the slot on our wide fast corners. Decided to fit a TSRF guide as in the picture, it is much deeper. I had to remove some of the plastic from the chasis to allow the larger guide to move freely and also loose the radiator which is part of the chassis. I added some alloy mesh to the aperture in the front of the body to cover the rads absence. The lead wires were soldered to brass tabs I fitted to the guide and I can now use push fit braids. I didnt use the nut in the picture, I cut the post down and it is held in place with a self tapper and a washer. The car now stays in on the wide corners and seems to handle better. I don't think this guide would be of benefit on a plastic track but works well on our routed track