Balled-up Restraint Design Sketches

I've started working in earnest on the balled-up restraint, project number 3 from my "Top 10" list of last year.  This promises to be a good challenge, getting the fit just right for what is a pretty complex shape, in a crouched, balled-up position. I've already created a wrap from my model, and am figuring out exactly how this restraint is going to work. 

 I keep debating how I want to tackle the arms. Initially, I was going to go with long strait-jacket-style sleeves which would buckle behind her back. But the idea of laying on top of the buckle if my model was lying on her back didn't seem like a good solution. I definitely want to use this sack in that position, with her toe D-ring chained to the ceiling. 

I was toying with the idea of having the sleeve be continuous, with a zipper to lock the arms in position. They would form a permanent loop. I'm just not sure if that's going to give my model enough room to get in and out. But, it would be very clean looking. 

As it is now, this is going to take 2 zippers for entry. One in the rear from the top of the hood, down the back and through the crotch to the rear of the knees. The second zipper would be in the front, from the knees to the toes, securing the lower legs and feet tightly in the foot pocket. 

I'm posting an old drawing from 1998, just to show how long this idea has been kicking around in my head. Obviously there are many differences in the details and specifics, but the general idea is the same: a balled-up straitjacket/sleepsack type of design. 

By the way, I wanted to send thanks to everyone who has contacted me with support and encouragement for the ongoing "Top 10" projects. It's great to know there are people out there who actually enjoy following along and seeing the ideas brought to life. It does make a difference, and means a lot to me.