Before trying to wrench a flat 'biner around a small arc of lower diameter spar, i lead with a half hitch specifically to take direct load off the 'joint' (in big stuff too) of 'biner forming second choke around said spar. In this lacing, the 'biner termination goes to heavy side of leading half hitch so leading haalf hitch pulls closed and not open. Also, can schedule placement on any 'biner, to put in flattest position on spar; sometimes, cutting straigh kerf line to lay it into.
Or, choke in sling, using biner as quick connect to rigging.
[ August 24, 2002: Message edited by: TheTreeSpyder ]
[ August 24, 2002: Message edited by: TheTreeSpyder ]