As someone without access to a club library easily. The BCL is one of the major pros to my BCA membership. I get online copies of some journals and scans of pages of journals and magazines emailed to me on request every Wednesday. A pretty good deal especially if you're interested in caving...
Do you have a link for the Spoc, I've never heard of it before
The mini traxion is worth a look as it can stay on a crab whilst you put rope into it. And it's smallish
Screwgate Omni for a D ring
Various screwgates for everything else except my short cowstail which is a snapgate.
I use a petzl AMD for my stop which I find nicer than an oval.
I also have a 6mm maillon on one of the harness D ring loops for clipping bags to.
As Josh says
7mm maillons for rigging!