About use of toilet, I at beginning tried to "pull" labia but it is nearly not possible rightly with bands high in the thighs. For me most effective is "to hold" and not release the bladder suddenly.
In general to wear bands high over our thighs is much better, but if chain is long, it can hung and, or you have to spread your legs or you have to hold chain. In this sense 6 cm are perfect.
For cleaning, best is to have a syringe, it takes a little more of time, but even this way, I have friends that delay more than me.
A very harder for me is the another use... and I try to avoid. I am a little obsessed with cleaning and it stress me, even if it sounds strange. As you know I probably ask for a rear cable belt for June when I go to university and it is because then I will can wear more the belt, and maybe I will can not avoid the "big" use of the toilet wearing my belt.
About stretching:
Catherine, due you have to wear it very continuously, there are some exercises that can help you, I think they will help you, specially if you can do them better than me because your hip belt:
Kneel and with your back straight incline towards rear, maintain your back straight and incline until you can support with your arms.
If your bands are high, standing over a foot, hold the another foot in your back. Important keep your knees together.
Lay in the ground. Just push farther possible your feet and your arms.
If the chain from your belt to the band is long enough, kneel and bend your torso to the sides. You will feel relief in your hips.
Anyway, Catherine, even for circulation, it is much better ask for release and run a bit. If it is possible, of course.
There are another stretching but, try these first. Please actualize me about if these help you.