you can fit a layshaft one way to a kmc, you just need either this,
http://www.km-rc.com/oscommerce/cata...e93636ff2dc567
or this,
http://www.km-rc.com/oscommerce/cata...e93636ff2dc567
i have used both the universal version is more efficient so the cheaper dog bone version is sitting in my spares box
sorry if links are not apropriate, Jimmy