Re: Making eggs for egg sucking leeches
Match the egg size/color to prevalent species in your area.
If I was looking to make up a bunch of these flies, I'd get the hot melt glue gun out with the color of glue stick needed, rotate the hook in the vise and make up a bunch of hooks with eggs behind the eye, then simply add the Bugger Body. I'm assuming you have a vise that rotates on a true center axis.
*Comments posted above are only my opinion. I may be right....eh, I'm probably wrong. Take 'em for what they're worth.*