I'm buying a leftover 2009 shift 600 121inch track. My sled for the past few years is a 06 Indy 500 in the edge chassis. How will the new shift stack up for ride with the "cheap shocks" on the shift? My 06 Indy has a fox postion sensitive rear track shock and the nitrex twin tube gas shocks for the front track shock and the front ski shocks. Does the 09 shift rear skid have coupler blocks? I thought I read some where once that the 08's did not have coupler blocks and that the 09's did. If anyone knows for sure could you reply thank you.