I am in the process of changing my 2002 Summit Highmark X from a 151 to a 162. I have changed the drivers to 7 tooth to make a lot more room upfront for my 16x 2.25 track. I curently have rail extensions on the sled, however I want to find a set of rails that are long enough to use instead. Anyone know what I can use rails off of to not need rail extensions. They will end up needing to be 64in long from front to back. If anyone has done this before and knows what to use please let me know. thanks