I would like to recommend a post in the BoundAnna Link section to the readers of the DIY and SB Scenarios sections. The post title is "selfbondage safety ANZEN JIBAKU" and links to a blog in Japanese with very good illustrations of ice release cuffs, several positions involving straps, a futon, and maybe a door, and a fucking machine. If you scroll down the page there is a "Translate into English" button on the right margin, which makes thing somewhat clearer, and a "Next Page" arrow at the bottom which goes on to the next 4 or 5 pages. The post has relatively few views, but it deserves more.
Check it out,
Mar Lingspike