Mark, I modeled in N about 50 years ago (yikes!), using the standard N couplers of the time The paint jobs were gorgeous, but the mechanicals are another story. But
with the dexterity and eyesight we probably both share today, I can’t imagine doing N scale today. I also really enjoy the heft and size of O. But for now, I’ve got to dismantle my layout , pack and store all my trains, so that my new train room basement, er…my wife’s new first floor bedroom and kitchen may be built.