set up my razzo for 1x9 raceface evolve s/s crank sram x9 short cage r/d sram 34 tooth cassette sram chain shortened chain after a few rides chain started jumping off ordered paul chain keeper and am trying to install does not seem i can get keeper low enough as it rubs on crank where chain ring bolts on and the distance between chain and keeper seems to far to keep chain on does anyone have any experience with the paul keeper