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Here is a good park set up. I have 175 Trouble Makers with center mounted S912's. They hardly got any use in the park, they were mostly used for cruising groomers. I center mounted them b/c I thought I was gonna use them for park but then I got hurt. The bases are still in great condition it is just the topsheets that are scratched, but that won't effect the performance. I will let these go for $150 plus shipping.