Here's a Ministar5 before soldering an emitter. At the time of this picture, I had removed the K2 and desolder-wicked the pads. Afterwards, I put kapton tape over the terminal solder pads. Next, I soldered the .030" copper slug down to the center pad. The copper slug is relatively big, and would have shorted the pads if I hadn't put the Kapton tape down. To finish the job, I put a bead of thermal epoxy around the slug, and backfilled some in the crevice where the Kapton tape was. This fillet of material also acts like a solder-mask, because it prevents the solder from the terminals from running back under toward the copper slug.
I prepared it for MattK. I was able to test it on the bench, where it worked fine. I sent it to MattK, he will mount it in a MiniMag and see how it works. I'm not even 100% sure the copper slug was needed. Sorry, I don't have a picture of it in the completed state.