Many thanks, all!
Great conversion! I really like the paint job and the shield is excellent. One minor detail, I kinda with the mace had a spike on the top.
Yes, I think that would improve it. The mace is quite fragile, though - not, oddly enough, where I transplanted the head, but where the haft meets the hand (it's broken halfway through several times). I might try to "melt" a suitable spike on with plastic cement, but it will be a delicate task.
I showed the miniature to my son this morning and asked if he liked the octopus shield. "Daddy," he said scornfully, "That's more like Cthulhu than an octopus. Octopuses don't have reptilian eyes."