im doin my head in a lil bit and i've been hearing bad things about ti retianers... im putin in skunk2 cams, cam gears,skunk2 springs,skunk2 retainers, stock valves... i was wondering if i should...could swap the skunk2 retainers for stock ones cuz i've heard that u have to inspect them ever 15k miles... its a daily driven car gunna see about 8500 rpm... thanks guys.. could i even use stock retainers on skunk2 springs?