After using a an ITEC dolly for so long, going back to the A-dolly is like going from the space shuttle to a horse and buggy. It takes longer to do my work; more hooking and unhooking, switching trailers around. Going down the road there is a considerably more trailer sway. Also, I believe that when the rear trailer sways and moves the dolly, it also allows the front trailer to move more. ITEC’s dollies provide stability to both front and rear trailers.