run two geckos from same pins

I am sure someone is doing this already.
i am building a table with twin screw drive on X.
Will I have to do anything special to facilitate running two
gecko210s with the same step and dir. pins from parallel port?
I know it would be ideal to have the screws connected with a timing
belt,but at 48" center to center I expect it would take at least "H"
series to get a standard length.
thanks
Carl