thanks for the replys....

i think you might be right i might have to go with 2 leadscrews on the x axis but this will not be a problem to add another if the one down the middles does not do the job i will just machine another leadscrew and move them to each side of the machine.

i am going to get all the structure together first and then buy the motors last but its looking good so far i have some good ideas for the machine and i will take some pictures to show you guys how i have made it and the finished machine....maybe it could help others to build there machines....looks really proffesional out of the aluminium extrusions :) really happy so far. will keep you posted once i get all the pictures.

thanks,
Gaz