I have an 01 blaster with a + 4 swing arm i'm having a problem with the stock lower stud on the frame from a old roller hitting the chain . A standard roller will not work. I'm running the TM design chain guide on the lower swing arm and a TM design chain guide for the top of the swing arm off the (engine) primary gear for the chain. I'm considering a spring loaded chain tensioner on bottom keeping the chain off that stud. I don't want to eliminate the stud in fear of tearing the shifter out of the case if the chain ever came off. Any other clever options that anyone has engineered. Thanks for any Ideas or Pics.