Redmaynes bastard. Prussia with cinch strap

This was developed by looking at the redmaynes catch by the duchy. This bastardized version uses a single rope loop and improves on the functionality. The first is to make a Prussik loop before taking the tails and tying a knot in them to keep the cinching side from collapsing. The tail on the left is tied to whatever you like and the other is tied to the two tails from the loop and becomes the cinching knot the tail should point in the same direction as the other tail and pull the strand downwards. The loop of rope from the knot of the two tails to the clinching knot determines how far it goes. This is mostly unnecessary but for safety you can shorten it. The cinching tail is then pulled to close the Prussik loop. A fair warning is that this is not escapable. This knot should be thoroughly tested before use.

This is especially useful for boxties to tie down both arms in the middle which is nearly impossible to do. Secure the tail to a chest harness, thread your arms through, grab the tail and pull down to secure it.  If you did it without an escape mechanism it should be impossible to get out of.

I've tested the Prussik loop and I can vouch for its inescapable power. Even without tightening it all the way and tying my hands in front of my body, it was very difficult to attack the knot from any angle.

I wouldn't use it in self bondage though, for me it's more of a 'do it with a partner' kind of knot. It really makes you feel dominated, as there is no real escape from this devilish knot.

I've tested the Prussik loop and I can vouch for its inescapable power. Even without tightening it all the way and tying my hands in front of my body, it was very difficult to attack the knot from any angle.

I wouldn't use it in self bondage though, for me it's more of a 'do it with a partner' kind of knot. It really makes you feel dominated, as there is no real escape from this devilish knot.

I agree. Using this knot as a handcuff knot or other methods is dangerous. I recommended using it in boxties as the elbows could be freed and to just pull your arms out the sides. A safety measure would be to put a small loop with a ring attached on the end on the inside to free yourself by hooking the ring and pulling.

My first post, so yay!
Could you do a step by step please? I'm trying to wrap my head around this but I can't seem to get it right.