I've been told shinys ones arent always 100% balanced anyway (some being quite bad). I dont like the design of theirs more than anything tbh lol. Its defintely something I want though...let me know if you ever have more time than you know what to do with Stig lol (y)
heres a link to shinys website with dyno graphs showing b4 and after also after i put mine on from him i notice it revd up faster/cleaner as less weight on the crank. and another gd thing is u dnt have 2 upjet or change rollers or anything purely bolt on. http://www.shiny-red.net/tuning-guides/106-dyno-result-for-adding-a-lightened-flywheel