Saw this in an older edition of CW, looked interesting. Same concept of the Throttlemeister, different implementation.
http://www.adventurersworkshop.com/Merchant2/merchant.mvc?Screen=PROD&Store_Code=AWI&Product_Code=KAOKO_HNDST
http://www.adventurersworkshop.com/Merchant2/merchant.mvc?Screen=PROD&Store_Code=AWI&Product_Code=KAOKO_HNDST