Well , ran two packs today on our new track we made , wow ! That was alot of work , but now it's a ton of fun , anyways , after 2 packs brought it in to the table for inspection and the back shock tower looks like a washboard , I read how this is inevitable , so I was looking for it , I'm thinking g going with my faithfully hot racing towers , they run about $65 for the pair , anybody no any other makers ?