Ok, I'm sure someone has probably already tried this, but I have to ask. Since one of the biggest chalanges with redrives is isolating them from the engine power pulses so they don't dissintigrate, why couldn't you use a cogbelt psru but with an idler pulley on each side pushing in using a spring. Wouldn't this allow the engine power pulses to be absorbed? Also, it would eliminate belt tension issues, and possibly reduce the overall side load on the crank bearing. Any thoughs/comments from the engineers out there? This is the idea I have wanted to try when I get to that point, so any info would be great.