Ok, call me crazy here, but i disagree with some of this.

Yes, typically, excessive handling can cause stress....it can cause snakes to
go off their feed, and just freak out in general.
however.... There are some that tend to "like" attention.
My Loki is very similar to Monty. When I'm at home, Loki is out of his hide, roaming around, looking for an opening in the tank.
When I hold him, he crawls all over me, in my hair, and yes, just like Monty,
when i go to put him back in his tank, he acts like he doesn't want to be put down, and he attempts to climb back up my arm.
And, he did this even before he acquired his tankmate, Merlin.
Merlin is the typical ball in this situation....always in his hide, only comes out at night...

There are always exceptions to the rule, and there's nothing wrong with that.
So, my opinon....I say if Monty is healthy and shows no problems, handle her all you want. I take my boys for walks, for rides in the car, and I even take baths with them when they need to soak. People are always gonna tell you you're doing something wrong, but always think of the snake first, and remember....everything in moderation.