Why is it that sometimes my notifications get lost in translation... I should be getting notifications anyway as I have commented and am "watching" this thread, but even with the addition of you tagging me I got no notification for some reason. Now I stumble onto 5 pages that I am behind on.
Anyway, sorry.
I do use the Bulldog Bone style BOLA with the captain on the secondary side of my 7/16 KM III 2 in 1 lanyard. I have not tried other lines as this has been very suitable for my application. The BOLA is extremely capable and suited for the Captain Hook and how I use it. I should probably try some other lines too, but I can't get passed the, "if it ain't broke don't fix it."
Other rambling:
I have my Captain 'permanently' attached to the secondary side of my lanyard. There have been a handful of circumstances where I would prefer a carabiner termination rather than the hook, but I can always throw a A.Butterfly or Marlin Spike into my lanyard short of the hook and put a carabiner there if I need it as a second traditional lanyard.
Also you can plan for the climb at hand and set yourself up without the hook, 2 separate lanyards, or hook on a separate system altogether, etc. I find that in carrying the hook with me on "every" climb it is not sitting idle. I use it all the time. Like Moss, I use it as a third work positioning tool. 1. I have my primary climbing line 2. I'm bucked in at the branch I'm working 3. I have my Captain at a short arms reach hooked to give me that apposing positioning point. Sometimes even when you are tied in twice it is convenient to have that third arm to stable yourself for a cut. I use it to advance myself out on a limbwalk or up a second lead in a tree, I use it to free hangers that are out of reach, retrieve ropes that are out of reach (also retrieving natural redirects...let me know if you aren't sure what I mean by this 'cause this is very handy.), I've even lowered my saw down for refueling as a quick bridge to the groundie. I actually rarely use it for traversing into other trees. I definitely use it for it's intended purpose I am just emphasizing the breadth of uses it has and other reasons to carry it.
I understand why people wouldn't want to bring it on every climb and to simplify and lighten their load, so i'm not saying this is the way to go. I am just sharing my experience and how this system has been working for me. I like it.
I'm HOOKED.