
Lower is better than higher. By far!
After the conversation with Drew from Different Bikes I realized that the lower stem makes it for much much better steering control, body position and overall riding.
It is simple to "hunt for" the sweet spot: no cutting of anything is needed. I simply took a big fat spacer from the bottom and put it on top of the stem!
I was amazed what a couple of mm do in this context, it may as well be miles of distance for a bike-less-self-propelling individual in a totally different context.
And yes, I made sure that all the bolts are tight when I was done: I first loaded the star nut and then tightened the stem bolts, not the other way around!