7/64'' amsteel strength?

[Bubba]

... couldnt you just do the straight eye bury, and snip the ends evenly, then do the end knot? Ive done that with some mason line soft shackles.

I have done that and used shrink wrap to keep the end from unraveling.

[gargoyle]

I weigh 330 and they have held me. I hung on a set for over a month of indoor testing.
I followed the tutorial.
I feel the backsplice keeps the knot from creeping. I dont know if shrink wrap will stand up to full weight bearing loads. my .02

[Bubba]

...
I feel the backsplice keeps the knot from creeping. I dont know if shrink wrap will stand up to full weight bearing loads. my .02

I thought about that too. I loaded it before cutting the ends and shrink wrapping. When I made others according to opie's instructions, I couldn't guarantee that all of the longer buried portion was in the knot. I though by tying the knot first I could see the bury was fully incorporated in the knot. I left about an inch and I check to see if it is slipping often. So far it has not moved.

[DemostiX]

Ok, now let me ask this. Is it really needed to bury the standing end back into the constrictor part? couldnt you just do the straight eye bury, and snip the ends evenly, then do the end knot? Ive done that with some mason line soft shackles.

In the soft shackles most of us are envisioning, what you are calling "the constrictor part" is not doing any constricting. It is only serving to help keep the eye closed and to act as a pretty slippery chafe guard and padding over the interior loop of cord.

There is at least one other style of soft shackle, Kohlhoff style,sold to sailors for rigging in Europe, in which the loop acting as a latch, strangling the knot, is created by carefully separating the strands in two parts and passing the rope back through itself, just as you do when making a Brummel splice. In this variation, the line is not buried and the double loop cord is fully exposed going from eye to stopper knot.

See Alan Edwards' http://l-36.com/soft_types.php.