I am not sure what you mean, It been about 30 years since I had a slot car set. What I recall is that they hooked under the in the track on the verticle and top sections of the track. Are you familiar with a type that might slide on. I am always looking for something better. Its funny, my 9 year old daughter looked at the latest revision tonight and then gave me a detailed description of a realistic looking guard rail that slid on and explained how it would be much better than what I had done.
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