Yes on wishing the Montana had buttons. With gloves, it is easy to just barely miss the + or - . I still have two 276's but only one working. I use it on the KLR for local roaming as it goes to 1.2 scale and still has max info. And ,. +/- buttons. Bought my first 176 in '95 and had been with that platform ever since.
I don't care for the Montana's drawn out search procedure for fuel station and motels.
But, with the 276 not even being able to be repaired by Garmin any more, may as well learn the Montana.