Hi washout
Congrats on your new purchase, just had a quick look to see what you had bought and it is similar to my Elliot Emcomat 7,but seems better in the saddle department, i believe there is no dedicated drive shaft on the machine(mine's the same) so i would not take too much notice of of the feeds ect, what i have been doing over the years is using the rack and pinion to traverse the sadlde(while rough cutting ) and only engaging the leadscrew for the finishing cut,this way it cuts down wear on the leadscrew and nut,Copious amounts of oil applied to the length on the leadscrew you will be using, this will mean you can manufacture a half decent screw thread if you need to, whatever happens the leadscrew is going to wear nearer the chuck end of the bed, but i have had mine in service for thirty odd years and its still performing well, using the rack and pinion for feeding you can get a better feel for how the material is cutting.
Hope that helps
Regards
Mike