It sure was a pain over my 38 yrs as a heavy equipment operator to have 2 different patterns of controls. I could run them both, but learned on SAE or Cat controls and was way more comfortable and felt more natural, over the ISO or John Deere style. Good thing was for quite a few years now, most of the excavators from minis all the way up to 400s have a lever or a valve, or newer ones you program on the control panel, to easily choose what pattern you are comfortable with which was very handy.