Laidoffsick posted:740 is the only one I use now. If you want to couple up to 3 rail couplers, use the 805. The 740 is compatible with the 805s, but if you want to do hands free switching.... the 805 does work better for that.
I use the 746 on cars like the auto racks or 89' flat cars, and some passenger cars because they have the extended shank.
#740s for me as well.
Fronts of the motive power get Protocraft for looks.
only exception are the new designs for the truck-mounted Kadees, that get the #747s.
plenty of videos out there... oh Google!
thanks,
Mario