I like your idea about using a dowel rod. The first Vcap trim though is really small and would work as well.

The second trim is my choice, it has an indent for the BB to sit on and helps keep water from getting to the BB. It is what I used and doesn't take up a lot of area on the counter, looks like it belongs there.

Visually, I would measure from the window sill to the trim. Install BB between window and cabinet at the height of same measure.

Do I remember you said the BB would not be capped at the bottom of cupboard?. Optional, but I did this with the little Vcap. After installation I also decided to run down to the floor, even with the small 6" between door way and counter. And think the last pic should have gone all the way to the fridge.

I too like the second choice.

Technicolor - "Visually, I would measure from the window sill to the trim."
Do you mean window sill to the counter where the bottom trim will go? That makes sense. It's 10-1/4" to the top of the sill.

No, I wasn't planning to cap the bb at the cupboard. I'll keep that in mind about the v cap.

So if option 2, it's correct to go from cabinet to counter using that trim and having the counter overhang with nothing above it?
Follow me?
Athomeinva did this and it looks nice. (Hope you don't mind me posting this Athome, I'll remove it then.)
{{!gwi}}

If I did the corner w/ trim attached like this and still had the overhang, is that right?
{{!gwi}}

Or should I have the trim angled at the bottom and the same trim coming down to it?

bump

That makes sense. It's 10-1/4" to the top of the sill.
From the window bottom "trim" to the sill. Use this measurement for height of BB on side of windows.

So if option 2, it's correct to go from cabinet to counter using that trim and having the counter overhang with nothing above it?

The pic is an odd corner to me, or does the cabinet go all the way to the wall on left? If not, I would also put the BB from counter to height determined by window sill/trim measurement in this situation. In my case with a corner like this, I went with BB all the way to outside corner above the counter.

Or should I have the trim angled at the bottom and the same trim coming down to it?

This was the corner on the right that I suggested the BB go all the way to the corner and down to floor. It's a visual thing to me, others are welcome to disagree. If this were not such a short wall, I'd say from cabinet down. But the height of BB won't match the area by the sink. Not sure what you mean by an angle.

The reason I added a small trim to the bottom of cabinets is I can see them from my living space. It made me feel better looking at them. Another visual thing from my senses.

Second trim choice.

Tech - Oh ok, from the trim to the sill it's 3-1/2"

"The pic is an odd corner to me, or does the cabinet go all the way to the wall on left?"
I'm confused. Here are some better shots of the space that will be going through transformation. The end cabinet & counter I'm showing above is the last cabinet on the left of these photos. There's wall space beside them (about 2') and then there are patio doors and a few more feet of wall.
{{!gwi}}
{{!gwi}}

I am going to go with the second trim style. I'll pick it up sometime this weekend.