I'd second wanting to see the tatt. But jeez, why wouldn't I? Actually, reading through the thread, I've noticed a few pretty low tech solutions that don't take all that much to produce.
1. To simulate ball joints without the expensive step of tattoos, you can use black sharpie'd rubber bands. Or just draw on yourself with stuff that comes off. Temporary henna tattoos if you want patterns that take a couple of weeks to come off. And being that those are somewhat flesh coloured (Dark and light), they seem a lot more like the flesh coloured joints you might get with dolls and mannequins.
2. And here's a REALLY low-tech thing me and my current sweetie have employed. You've seen em too. Likely at convenience stores. I got mine at a truck stop. Those kind of extendable keychains on a retracting loop. Here's a pic I found on a website somewhere:
See what you have there? On the back of your pants, or collar, or corset, you have a ready made pull string to make dollie say all manner of things. This can be especially useful in conjunction with some complimentary hypnotic triggers. Ones that produce a pleasurable response in the dollie when its string is pulled and says whatever happy thoughts are on its mind at the moment.
Note, I am not saying 'its' mind in an attempt to dehumanize. I simply say that in an effort not to assume all dollies are femmes. I have not found ways, presently to make or affix or use windup keys on a willing volunteer yet. Has anyone experimented with this or come up with any solutions beyond the sort of cheap plastic looking costume shop affairs?