Del, I know exactly what you're talking about. I'm very familiar with the tilt, it's physics, and the sliding fulcrum that bowyers 'should' navigate when the bow hand and string hand fulcrums part ways, and I work to minimize it or eliminate it from beginning to end of the bow making process. It's one of the most important aspects of my bow making and has been for a long time.
The way I hold the bow, my bow hand fulcrum is above handle center, which is where I place bow center. String fulcrum is slightly above them, so yes, initially on the tree with a single hard pivot point placed where the full draw balance point will be when I get there, with the lightest pressure it will begin to tilt, but very, VERY quickly balances. I make sure of it. It's so slight that in my hand, just the give of the flesh eliminates it, even with an open hand. There's no visible tilt. But I've become hypersensitive to it, so I can still feel that minimal fulcrum shift 'inside' my hand. I just went and grabbed a bamboo backed osage bow, strung it, nocked an arrow, and played with the early draw. No tilt. Sorry brother. Took me many years to get them that way. But that's where they're at.
Trust me, I can reveal the slightest bit of it with ease, and with bows where it happens... I see it tilt in my hand, I feel it in my hand, and I see it on my tillering tree. Some bows tilt so harshly in the early draw I think this is why some guys hold them stationary and pull the string in line with the center of the grip. They refuse to balance their bows by pulling the string where their hand will, or on tillering trees that allow them to tilt. The harsh initial tilt freaks them out, confuses them, panics them, and they fall back to 'just tiller em all slightly positive'.
I don't want to argue either, but healthy respectful debate can be informative for all. I'm just saying there are other factors that we can control that can reduce or eliminate it. We don't have to grip it tight to stop it, unless we want to make bows that way or prefer shoot that way. Though I don't know why anyone would. But even when it happens, most people don't see the tilt or feel it as a negative thing, they don't design their bows to reduce it, tiller to reduce it, they just ignore it, or don't know or care, and like it that way... until it's bad enough the bow complains or the arrows don't fly so good.
