I don't fish A-rigs but I dig the Shad Head/Wire Keeper. It pulls from the Nose, goes down to 1/8 ounce. The Wire Keeper is great, IMO, for 2 reasons...incomplete Collar pours are sometimes troublesome (which is a problem with harder and/or dirty and/or cooler lead), and the Wire doesn't swell the plastic like a Lead Collar does so You can use narrow plastics without splitting the plastic by over-stretching, as can happen with the Lead Collar.
The Almighty Dremel is a Lead Pourers Friend. Many molds only need mild modification to the Hook Wire Recess/Recesses to accept the heavier wire and longer hook-eye-wire of bigger hooks, respectively.