Marna, not sure. Altering where mine are on the bars also changes the angles for when you are on the hoods on them, and there was a clear compromise I had to make. With them in spot-on for hoods, they were way too far away on the fingertips for the drops.
What I did find useful, though, was realising that the horns could be in the same place at the same angle in relation to my hands/rest of bike, but in a different place on the bars, with the bars at a slightly different angle (rotated in the stem clamp).
I have a narrow anatomic type set of bars on my bike though can't recall whose they are right now.
What I did in the end was tape the bars with not as tight taping around the horns as would be normal, but still have it there as it makes a bit difference to the hand position, which let me change the position of the shifters easily for slight adjustments up/down and also rotate inwards/outwards to experiment.
I also undid and redid the taping as needed, for the most part with enough success that the tape was where it needed to be for testing it, though it wouldn't have stood up to wet or any reasonable distance of riding.
Once I was happy, I left it for a while to be sure, then ripped all the tape off and redid it properly.
If I ever get back on the bike regularly I fully expect further tweaking and have some nice bar tape ready for the occasion
You'd be welcome to pop in if you're anywhere near (30 mins SE from Northampton) to have a go with my adjustable levers (it's on the turbo still) though they are STI so both brake and gear, can't cope with bar-end shifters.