If possible, please post a pic of one of the leaves. The closest I have gotten to an ID for your hoya is sp. AH-0240, but that is based upon the flowers and what I can see of the leaves. Here is a link that might be useful: AH-0240

It is not Krimson Princess, which is variegated on the inner leaf portion, instead of being albomarginated, which is what you have. There can be so much difference between the same plants, but if the leaves and stems are substantially thinner than your known Krimson Queen, I would look up other albomarginated hoyas and compare. Sometimes, the only way to ID a hoya is to wait for it to bloom.

Yeah, you can let the vines hang down, sure. You can unwind them from stuff you don't want them wrapped around without doing damage. Some of us are constantly doing it. I'm confident they are most efficient with their growth the less you disorient their growing tips and leaves, etc. But you gotta do what you gotta do. I used to have mosquito netting curtains behind my plant shelves and the Hoyas were constantly poking their little grow tips through those tiny holes and then sprouting leaves on the other side before I could stop them. Actually, I swear bella is happier in that stuff lol. I used to keep mine in AV soil and I swear I had the easiest time growing it then. I often think about moving it back. It's because I'm an underwaterer and bella is pretty thirsty. But aside from that, I 100% agree with you that it is preferable to keep your plants in a uniform medium, that you have gotten to know well. The biggest Hoya problem I've ever caused myself was when I decided to put some Hoyas in one mix and other Hoyas in a different mix and a third group of Hoyas in a different type of pot. Maybe they were all in their ideal setups, but their schedules varied too dramatically and well, I just couldn't keep track of it all. Whatever minor advantage they would have experienced from their strategic setup was wrecked my the limitations of their human. Neat that your family has been growing bella for decades. That's an unusual one to start with!

Here's a leaf pic. They are longer and more pointed than my hoya carnosa leaves. The flowers look different too; longer stems coming from the nub.