Elmer's Super Fast Epoxy or something similar
cufflinks with 8mm pads
square, four top legos - thick or thin work.
disposable containers and stirrers for mixing epoxy
Notes on glues:
These proved especially difficult. Perhaps it was the coating on the cufflinks, perhaps I was too rough when testing the bond (though I guess that's not a bad thing), perhaps the glue gods just didn't like me at the time. I used my standard Aleene's 7800 glue on these with no luck except for the red pair, and who knows why that one decided to adhere! Then I tried Gorilla Glue epoxy and it also failed to stick. So I'm highly recommending the Elmer's epoxy (thanks to Randy for the suggestion!) - I want anyone who duplicates this to have a successful project, and not three days of cussing like I had. ;)
Notes on obtaining cufflinks:
The local bead store had them, but not the right size. Michael's did not carry them. I would recommend buying them off ebay, as you can get them much cheaper and in bulk. I got 5 pairs for $15 there. You can go even cheaper than that if you'd like to wait to have them shipped from Japan! I also have to recommend buying supplies from etsy - the sellers there are amazing and just as cheap, if not cheaper than ebay.